The following figure presents the synthesis process of a polymer $\mathbf{P}$:

<MultiModal>![The figure presents the synthesis process of polymer $\mathbf{P}$ through 5 consecutive reactions. The reaction substrate is `CCCCCCCCCCSC(SC(C)(C(OCC1CC2C=CC1C2)=O)C)=S`. The conditions for the 5 reactions are as follows: 1. AIBN with `C=CC1=CC=CC=C1`; 2. AIBN with `COC(C=C)=O`; 3. AIBN with `CC(C)(C)OC(C=C)=O`, producing intermediate $\mathbf{A}$; 4. Two-step reaction: (1) Grubbs II (2) `CCOC=C`, producing intermediate $\mathbf{B}$; 5. Two-step reaction: (1) TMSI, THF (2) $\mathrm{H_2O}$, producing final product $\mathbf{P}$](/media/uploads/8dca4252-db67-42f5-b9c5-471132f3701a.png)</MultiModal>

Known:
- $^{1}\rm H\ NMR(300 \ MHz, CD_2Cl_2, ppm)$ data of intermediate $\mathbf{A}$: $\delta$ 0.80-0.90 (3H), 1.10-2.05 (~430H), 1.25-1.60 (s, 684H), 2.74-2.79 (2H), 3.23-3.50 (2H), 3.65 (s, 84H), 6.03-6.15 (2H), 6.30-7.40 (140H).
- Number average molecular weight: $M_{n,\mathbf{A}}=15600\mathrm{~Da}$，$M_{n,\mathbf{B}}=1.59\times 10^{6}\mathrm{~Da}$

Based on the synthesis process, deduce the structure of the polymer and, based on the experimental data, deduce the number of repeating units, and choose the correct option from the following.
下图呈现了某一高分子 $\mathbf{P}$ 的合成过程：

<MultiModal>![图中呈现了通过连续的5个反应合成高分子 $\mathbf{P}$ 的过程，反应底物为 `CCCCCCCCCCSC(SC(C)(C(OCC1CC2C=CC1C2)=O)C)=S`，5 反应的条件如下：1. AIBN 与`C=CC1=CC=CC=C1`；2. AIBN 与 `COC(C=C)=O`；3. AIBN 与 `CC(C)(C)OC(C=C)=O`，反应生成中间产物 $\mathbf{A}$；4. 分两步反应：(1) Grubbs II (2) `CCOC=C`，反应生成中间产物 $\mathbf{B}$；5. 分两步反应：(1) TMSI, THF (2) $\mathrm{H_2O}$，反应生成最终产物 $\mathbf{P}$](/media/uploads/8dca4252-db67-42f5-b9c5-471132f3701a.png)</MultiModal>

已知：
- 中间产物 $\mathbf{A}$ 的核磁共振氢谱数据：$^1\rm H\ NMR(300 \ MHz, CD_2Cl_2, ppm)$: $\delta$ 0.80-0.90 (3H), 1.10-2.05 (~430H), 1.25-1.60 (s, 684H), 2.74-2.79 (2H), 3.23-3.50 (2H), 3.65 (s, 84H), 6.03-6.15 (2H), 6.30-7.40 (140H).
- 数均分子量：$M_{n,\mathbf{A}}=15600\mathrm{~Da}$，$M_{n,\mathbf{B}}=1.59\times 10^{6}\mathrm{~Da}$

请你根据合成过程，推断高分子的结构，并根据实验数据，推断重复单元的数量，选择下列选项中正确的一项。
All other options are incorrect.
<MultiModal>![This is a graft polymer, wherein the repeating unit of the main chain can be represented as `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`, with a degree of polymerization of 102, and the end groups on both sides of the main chain are `[*]=C`. The repeating unit of the main chain is a triblock copolymer side chain, wherein `[*][CH2:1][CH:2](c2ccccc2)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH2:3][CH:4](C(=O)OC)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH2:5][CH:6](C(=O)O)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 76.](/media/uploads/1b21a807-cf0d-49f9-b3c2-fceca0d2f755.png)</MultiModal>
<MultiModal>![This is a graft polymer, in which the repeating unit of the main chain can be represented as `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)O)[CH2:5][CH:6](C(=O)OC)SC(=S)SCCCCCCCCCCCC`, with a degree of polymerization of 100, and the end groups on both sides of the main chain are `[*]=COCC`. The repeating unit of the main chain is a triblock copolymer side chain, where `[*][CH2:1][CH:2](c2ccccc2)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH2:3][CH:4](C(=O)O)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 76; `[*][CH2:5][CH:6](C(=O)OC)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28.](/media/uploads/269162eb-cfcf-4f53-bd6a-b952dde278c3.png)</MultiModal>
<MultiModal>![This is a graft polymer, where the repeating unit of the main chain can be represented as `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`, with a degree of polymerization of 102, and the end groups on both sides of the main chain are `[*]=COCC`. The repeating unit of the main chain is a triblock copolymer side chain, where `[*][CH2:1][CH:2](c2ccccc2)[*]` constitutes a repeating unit of the side chain, with a degree of polymerization of 140; `[*][CH2:3][CH:4](C(=O)OC)[*]` constitutes a repeating unit of the side chain, with a degree of polymerization of 84; `[*][CH2:5][CH:6](C(=O)O)[*]` constitutes a repeating unit of the side chain, with a degree of polymerization of 684.](/media/uploads/f4842a34-64ed-417d-b9ee-1c10a0d1257f.png)</MultiModal>
<MultiModal>![This is a graft polymer, where the repeating unit of the main chain can be represented as `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)S`, with a degree of polymerization of 102, and both end groups of the main chain are `[*]=C`. The repeating unit of the main chain is a triblock copolymer side chain, where `[*][CH2:1][CH:2](c2ccccc2)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH2:3][CH:4](C(=O)OC)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH2:5][CH:6](C(=O)O)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 76.](/media/uploads/cfe9b398-40a7-4d21-99ac-0363614d2595.png)</MultiModal>
<MultiModal>![This is a graft polymer, where the repeating unit of the main chain can be represented as `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`, with a degree of polymerization of 102, and both end groups of the main chain are `[*]=COCC`. The repeating unit of the main chain is a triblock copolymer side chain, where `[*][CH2:1][CH:2](c2ccccc2)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH2:3][CH:4](C(=O)OC)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH2:5][CH:6](C(=O)O)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 76.](/media/uploads/5feb2693-f862-478c-99fe-325713ab7113.png)</MultiModal>
<MultiModal>![This is a graft polymer, where the repeating unit of the main chain can be represented as `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH:1](c2ccccc2)[CH2:2][CH2:3](C(=O)OC)[CH2:4][CH:5](C(=O)O)[CH2:6]SC(=S)SCCCCCCCCCCCC`, with a degree of polymerization of 102, and the end groups on both sides of the main chain are both `[*]=COCC`. The repeating unit of the main chain is a triblock copolymer side chain, where `[*][CH:1](c2ccccc2)[CH2:2][*]` constitutes a repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH:3](C(=O)OC)[CH2:4][*]` constitutes a repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH:5](C(=O)O)[CH2:6][*]` constitutes a repeating unit of the side chain, with a degree of polymerization of 76.](/media/uploads/1fb7dd00-dc6b-43dd-aa6c-f6287c064de1.png)</MultiModal>
<MultiModal>![This is a graft polymer, in which the repeating unit of the main chain can be represented as `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](C(=O)O)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](c2ccccc2)SC(=S)SCCCCCCCCCCCC`, and its degree of polymerization is 102. The end groups on both sides of the main chain are `[*]=COCC`. The repeating unit of the main chain is a triblock copolymer side chain, where `[*][CH2:1][CH:2](C(=O)O)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 76; `[*][CH2:3][CH:4](C(=O)OC)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28; `[*][CH2:5][CH:6](c2ccccc2)[*]` constitutes one repeating unit of the side chain, with a degree of polymerization of 28.](/media/uploads/1c5c4af5-57e3-43ae-8777-a0b4a104f7ff.png)</MultiModal>
其他选项均不正确
<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其聚合度为102，主链两侧封端基团均为 `[*]=C`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为76。](/media/uploads/1b21a807-cf0d-49f9-b3c2-fceca0d2f755.png)</MultiModal>
<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)O)[CH2:5][CH:6](C(=O)OC)SC(=S)SCCCCCCCCCCCC`，其聚合度为100，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:3][CH:4](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为76；`[*][CH2:5][CH:6](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为28。](/media/uploads/269162eb-cfcf-4f53-bd6a-b952dde278c3.png)</MultiModal>
<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其聚合度为102，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为140；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为84；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为684。](/media/uploads/f4842a34-64ed-417d-b9ee-1c10a0d1257f.png)</MultiModal>
<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)S`，其聚合度为102，主链两侧封端基团均为 `[*]=C`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为76。](/media/uploads/cfe9b398-40a7-4d21-99ac-0363614d2595.png)</MultiModal>
<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其聚合度为102，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为76。](/media/uploads/5feb2693-f862-478c-99fe-325713ab7113.png)</MultiModal>
<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH:1](c2ccccc2)[CH2:2][CH2:3](C(=O)OC)[CH2:4][CH:5](C(=O)O)[CH2:6]SC(=S)SCCCCCCCCCCCC`，其聚合度为102，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH:1](c2ccccc2)[CH2:2][*]` 构成支链的一个重复单元，聚合度为28；`[*][CH:3](C(=O)OC)[CH2:4][*]` 构成支链的一个重复单元，聚合度为28；`[*][CH:5](C(=O)O)[CH2:6][*]` 构成支链的一个重复单元，聚合度为76。](/media/uploads/1fb7dd00-dc6b-43dd-aa6c-f6287c064de1.png)</MultiModal>
<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](C(=O)O)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](c2ccccc2)SC(=S)SCCCCCCCCCCCC`，其聚合度为102，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为76；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:5][CH:6](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为28。](/media/uploads/1c5c4af5-57e3-43ae-8777-a0b4a104f7ff.png)</MultiModal>
First, observe that the starting species in the figure of the question is trithiocarbonate diester `CCCCCCCCCCSC(SC(C)(C(OCC1CC2C=CC1C2)=O)C)=S`, which is a typical reversible addition-fragmentation chain transfer (RAFT) polymerization reagent. Under the action of AIBN, it can undergo reversible addition-fragmentation chain transfer (RAFT) polymerization.

<Checkpoint>[Starting species can undergo RAFT polymerization/living radical polymerization](1)</Checkpoint>

AIBN will decompose to form isobutyronitrile radical `C[C](C#N)C`, which attacks the thiocarbonyl group in trithiocarbonate diester, causing it to cleave to form:

<MultiModal>![smiles为：CCCCCCCCCCSC(SC(C)(C)C#N)=S](/media/uploads/85602aa0-7f2f-4010-b446-78f3922fefb8.png)</MultiModal>

and radical:

<MultiModal>![C[C](C(OCC1CC2C=CC1C2)=O)C](/media/uploads/c12dd180-ddcb-410b-bb7b-395eaf970ca3.png)</MultiModal>

Among them, the latter acts as a chain initiator for living radical polymerization, initiating the chain polymerization of monomer molecules. The characteristic of this RAFT polymerization reaction is that trithiocarbonate end-capping can be obtained after one monomer is polymerized. This end-capping can continue to undergo living radical polymerization after adding AIBN and new monomer molecules to obtain block copolymers.

<Checkpoint>[After the polymerization reaction of one monomer, trithiocarbonate end-capping is obtained, and after adding AIBN, it can continue to undergo living radical polymerization with new monomer molecules to obtain block copolymers](1)</Checkpoint>

In summary, after the starting species undergoes living radical polymerization with styrene, the product structure can be expressed as:

<MultiModal>![结构可以表示为 `C2C(C1)C=CC2C1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)SC(=S)SCCCCCCCCCCCC`，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为 n](/media/uploads/f64ef02a-11ff-40f2-94a8-9e5fdd011c66.png)</MultiModal>

<Checkpoint>[The first step reaction yields `C3C(C1)C=CC3C1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)SC(=S)SCCCCCCCCCCCC`, where `[*][CH2:1][CH:2](c2ccccc2)[*]` constitutes the repeating unit](1)</Checkpoint>

By analogy, the first three steps are all RAFT living radical polymerization reactions. The final polymer $\mathbf{A}$ obtained is a block copolymer, and the structure can be expressed as:

<MultiModal>![结构可以表示为： `C3C(C1)C=CC3C1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为 n；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为 m；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为 b。](/media/uploads/14460fb4-d770-4b1e-9efb-834d3182a8f0.png)</MultiModal>

<Checkpoint>[$\mathbf{A}$ is a block copolymer: `C3C(C1)C=CC3C1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)OC(C)(C)C)SC(=S)SCCCCCCCCCCCC`, where `[*][CH2:1][CH:2](c2ccccc2)[*]`/`[*][CH2:3][CH:4](C(=O)OC)[*]`/`[*][CH2:5][CH:6](C(=O)OC(C)(C)C)[*]` sequentially constitute repeating units](1)</Checkpoint>

The process from $\mathbf{A}$ to $\mathbf{B}$ is a ring-opening metathesis polymerization (ROMP polymerization), which achieves the polymerization of the block polymer to a graft polymer through the olefin metathesis reaction catalyzed by the Grubbs II catalyst. Among them, ethyl vinyl ether added in the second step is a capping reagent, and the end group of its olefin metathesis polymerization is ethyl vinyl ether.

<Checkpoint>[Adding ethyl vinyl ether as a capping reagent, the end group of olefin metathesis polymerization is ethyl vinyl ether](1)</Checkpoint>

The structure of the intermediate product $\mathbf{B}$ can be expressed as:

<MultiModal>![中间产物 $\mathbf{B}$ 为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其聚合度为 v，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为 n；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为 m；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为b。](/media/uploads/61cd8856-60ba-4dd9-a8ec-ca8eba875285.png)</MultiModal>

<Checkpoint>[$\mathbf{B}$ is `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`, the end groups on both sides of the main chain are `[*]=COCC`, and its side chain structure is the same as $\mathbf{A}$](1)</Checkpoint>

The last step is the selective hydrolysis of the tert-butyl ester. First, TMSI is added to convert the tert-butyl carboxylate into a readily hydrolyzable trimethylsilyl carboxylate, and then water is added to obtain protonated carboxylic acid, resulting in the final product $\mathbf{P}$.

<Checkpoint>[The last step hydrolyzes tert-butyl carboxylate to carboxylic acid to obtain the final product $\mathbf{P}$](1)</Checkpoint>

The structure of $\mathbf{P}$ is shown below:

<MultiModal>![结构为将 $\mathbf{B}$ 中的羧酸叔丁酯水解为羧酸后的结构，其余部分不变](/media/uploads/e1522963-b01e-4c90-908d-886c8a4cd270.png)</MultiModal>

According to the information of the nuclear magnetic resonance hydrogen spectrum, the degree of polymerization of each segment in $\mathbf{A}$ is inferred. Corresponding the characteristic hydrogen atoms in the hydrogen spectrum with the hydrogen atoms in $\mathbf{A}$, we get:

- 0.80-0.90 (3H) corresponds to the hydrogen of the methyl group at the end of $-\mathrm{C_{12}H_{25}}$

<Checkpoint>[0.80-0.90 (3H) corresponds to the hydrogen of the methyl group at the end of $-\mathrm{C_{12}H_{25}}$](0.25)</Checkpoint>

- 2.74-2.79 (2H) corresponds to the hydrogen on the bridgehead carbon at the allylic position

<Checkpoint>[2.74-2.79 (2H) corresponds to the hydrogen on the bridgehead carbon at the allylic position](0.25)</Checkpoint>

- 6.03-6.15 (2H) corresponds to the alkenyl hydrogen

<Checkpoint>[6.03-6.15 (2H) corresponds to the alkenyl hydrogen](0.25)</Checkpoint>

- 3.23-3.50 (2H) corresponds to the hydrogen of the thioether methylene in $\mathrm{-SC(=S)S[CH_2]-}$

<Checkpoint>[3.23-3.50 (2H) corresponds to the hydrogen of the thioether methylene in $\mathrm{-SC(=S)S[CH_2]-}$](0.25)</Checkpoint>

- 6.30-7.40 (140H) corresponds to phenyl hydrogen, degree of polymerization $n=\dfrac{140}{5}=28$

<Checkpoint>[6.30-7.40 (140H) corresponds to phenyl hydrogen, degree of polymerization $n=28$](1)</Checkpoint>

- 3.65 (s, 84H) corresponds to methyl ester methyl hydrogen, degree of polymerization $m=\dfrac{84}{3}=28$

<Checkpoint>[3.65 (s, 84H) corresponds to methyl ester methyl hydrogen, degree of polymerization $m=28$](1)</Checkpoint>

- 1.25-1.60 (s, 684H) corresponds to the methyl hydrogen of tert-butyl ester, degree of polymerization $b=\dfrac{684}{9}=76$

<Checkpoint>[1.25-1.60 (s, 684H) corresponds to the methyl hydrogen of tert-butyl ester, degree of polymerization $b=76$](1)</Checkpoint>

- Combining the degrees of polymerization $n/m/b$, consider the remaining hydrogen atoms in the skeleton: norbornene ester end group (`CC(C(OCC1C2CC(C1)C=C2)=O)([*])C`, which has a total of $17$ hydrogens, remaining $17-4=13$), polyolefin chain ($3\times(28+28+76)=396$), trithiocarbonate end group ($25-5=20$) has a total of $13+396+20=429\approx430$ hydrogens, which exactly corresponds to 1.10-2.05 (~430H)

<Checkpoint>[1.10-2.05 (~430H) corresponds to the remaining hydrogen atoms in the skeleton](1)</Checkpoint>

According to the number average molecular weight $M_{n,\mathbf{A}}=15600\mathrm{~Da}$, $M_{n,\mathbf{B}}=1.59\times 10^{6}\mathrm{~Da}$, the degree of polymerization $v=\dfrac{1.59\times 10^{6}}{15600}=101.9\approx102$ can be obtained

<Checkpoint>[According to the number average molecular weight, the degree of polymerization $v=102$ can be obtained](1)</Checkpoint>

Combining all the above information, the structure of product $\mathbf{P}$ is:

<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其聚合度为102，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为76。](/media/uploads/5feb2693-f862-478c-99fe-325713ab7113.png)</MultiModal>

Therefore, choose option F.
首先，观察题目的图中起始物种为三硫代碳酸二酯 `CCCCCCCCCCSC(SC(C)(C(OCC1CC2C=CC1C2)=O)C)=S`，这是一个典型的活性自由基聚合试剂，其在 AIBN 的作用下，可以发生可逆加成-断裂链转移聚合(RAFT 聚合)。

<Checkpoint>[起始物种可以发生 RAFT 聚合/活性自由基聚合](1)</Checkpoint>

AIBN 会裂解形成异丁腈自由基 `C[C](C#N)C`，其进攻三硫代碳酸二酯中的硫代羰基，使其裂解形成：

<MultiModal>![smiles为：CCCCCCCCCCSC(SC(C)(C)C#N)=S](/media/uploads/85602aa0-7f2f-4010-b446-78f3922fefb8.png)</MultiModal>

与自由基：

<MultiModal>![C[C](C(OCC1CC2C=CC1C2)=O)C](/media/uploads/c12dd180-ddcb-410b-bb7b-395eaf970ca3.png)</MultiModal>

其中，后者作为活性自由基聚合的链引发剂，引发单体分子的链式聚合。该 RAFT 聚合反应的特性为，可以在一种单体聚合后得到三硫代碳酸酯封端，该封端可以在加入 AIBN 与新的单体分子后继续进行活性自由基聚合，得到嵌段共聚物。

<Checkpoint>[聚合反应在一种单体聚合后得到三硫代碳酸酯封端，加入 AIBN 后其可继续与新的单体分子后继续进行活性自由基聚合，得到嵌段共聚物](1)</Checkpoint>

综上，起始物种与苯乙烯发生活性自由基聚合后，得到产物结构可以表示为：

<MultiModal>![结构可以表示为 `C2C(C1)C=CC2C1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)SC(=S)SCCCCCCCCCCCC`，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为 n](/media/uploads/f64ef02a-11ff-40f2-94a8-9e5fdd011c66.png)</MultiModal>

<Checkpoint>[第一步反应得到 `C3C(C1)C=CC3C1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)SC(=S)SCCCCCCCCCCCC`，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成重复单元](1)</Checkpoint>

以此类推，前三步反应均为 RAFT 活性自由基聚合反应，最终得到的聚合物 $\mathbf{A}$ 为嵌段共聚物，结构可以表示为：

<MultiModal>![结构可以表示为： `C3C(C1)C=CC3C1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为 n；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为 m；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为 b。](/media/uploads/14460fb4-d770-4b1e-9efb-834d3182a8f0.png)</MultiModal>

<Checkpoint>[$\mathbf{A}$ 为嵌段共聚物： `C3C(C1)C=CC3C1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)OC(C)(C)C)SC(=S)SCCCCCCCCCCCC`，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]`/`[*][CH2:3][CH:4](C(=O)OC)[*]`/`[*][CH2:5][CH:6](C(=O)OC(C)(C)C)[*]` 依次构成重复单元](1)</Checkpoint>

$\mathbf{A}$ 到 $\mathbf{B}$ 的过程为一步开环易位聚合（ROMP 聚合），通过 Grubbs II 催化剂催化的烯烃复分解反应实现嵌段聚合物向接枝聚合物的聚合。其中，第二步加入的乙基乙烯基醚为封端试剂，其烯烃复分解聚合的端基为乙基烯基醚。

<Checkpoint>[加入乙基乙烯基醚为封端试剂，烯烃复分解聚合的端基为乙基烯基醚](1)</Checkpoint>

得到中间产物 $\mathbf{B}$ 的结构可以表示为：

<MultiModal>![中间产物 $\mathbf{B}$ 为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其聚合度为 v，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为 n；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为 m；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为b。](/media/uploads/61cd8856-60ba-4dd9-a8ec-ca8eba875285.png)</MultiModal>

<Checkpoint>[$\mathbf{B}$ 为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，主链两侧封端基团均为 `[*]=COCC`，其支链结构与 $\mathbf{A}$ 相同](1)</Checkpoint>

最后一步反应为选择性水解叔丁基酯的反应，先加入 TMSI 将羧酸叔丁酯转化为易水解的羧酸三甲基硅酯，然后加入水得到质子化的羧酸，得到最终产物 $\mathbf{P}$。

<Checkpoint>[最后一步反应将羧酸叔丁酯水解为羧酸，得到最终产物 $\mathbf{P}$](1)</Checkpoint>

$\mathbf{P}$ 的结构示意如下：

<MultiModal>![结构为将 $\mathbf{B}$ 中的羧酸叔丁酯水解为羧酸后的结构，其余部分不变](/media/uploads/e1522963-b01e-4c90-908d-886c8a4cd270.png)</MultiModal>

根据核磁共振氢谱的信息推断 $\mathbf{A}$ 中各个片段的聚合度，将氢谱中的特征氢原子与 $\mathbf{A}$ 中的氢原子相对应，得到：

- 0.80-0.90 (3H) 对应 $-\mathrm{C_{12}H_{25}}$ 末端的甲基的氢

<Checkpoint>[0.80-0.90 (3H) 对应 $-\mathrm{C_{12}H_{25}}$ 末端的甲基的氢](0.25)</Checkpoint>

- 2.74-2.79 (2H) 对应烯丙基位的桥头碳上的氢

<Checkpoint>[2.74-2.79 (2H) 对应烯丙基位的桥头碳上的氢](0.25)</Checkpoint>

- 6.03-6.15 (2H) 对应烯基氢

<Checkpoint>[6.03-6.15 (2H) 对应烯基氢](0.25)</Checkpoint>

- 3.23-3.50 (2H) 对应 $\mathrm{-SC(=S)S[CH_2]-}$ 中硫醚亚甲基的氢

<Checkpoint>[3.23-3.50 (2H) 对应 $\mathrm{-SC(=S)S[CH_2]-}$ 中硫醚亚甲基的氢](0.25)</Checkpoint>

- 6.30-7.40 (140H) 对应苯基氢，聚合度 $n=\dfrac{140}{5}=28$

<Checkpoint>[6.30-7.40 (140H) 对应苯基氢，聚合度 $n=28$](1)</Checkpoint>

- 3.65 (s, 84H) 对应甲酯甲基氢，聚合度 $m=\dfrac{84}{3}=28$

<Checkpoint>[3.65 (s, 84H) 对应甲酯甲基氢，聚合度 $m=28$](1)</Checkpoint>

- 1.25-1.60 (s, 684H) 对应叔丁酯的甲基氢，聚合度 $b=\dfrac{684}{9}=76$

<Checkpoint>[1.25-1.60 (s, 684H) 对应叔丁酯的甲基氢，聚合度 $b=76$](1)</Checkpoint>

- 结合聚合度 $n/m/b$，考虑骨架中剩余的氢原子：降冰片烯酯基端基（`CC(C(OCC1C2CC(C1)C=C2)=O)([*])C`，其中共有 $17$ 个氢，剩余 $17-4=13$ 个），聚烯烃链（$3\times(28+28+76)=396$ 个），三硫代碳酸酯端基（$25-5=20$ 个）共有 $13+396+20=429\approx430$ 个氢，恰与 1.10-2.05 (~430H) 对应

<Checkpoint>[1.10-2.05 (~430H) 对应骨架中剩余的氢原子](1)</Checkpoint>

根据数均分子量 $M_{n,\mathbf{A}}=15600\mathrm{~Da}$，$M_{n,\mathbf{B}}=1.59\times 10^{6}\mathrm{~Da}$，可得聚合度 $v=\dfrac{1.59\times 10^{6}}{15600}=101.9\approx102$

<Checkpoint>[根据数均分子量，可得聚合度 $v=102$](1)</Checkpoint>

结合以上所有信息，得出产物 $\mathbf{P}$ 的结构为：

<MultiModal>![这是一个接枝聚合物，其中，主链的重复单元可以表示为 `[*]=[CH]C1CC([CH]=[*])CC1COC(=O)C(C)(C)[CH2:1][CH:2](c2ccccc2)[CH2:3][CH:4](C(=O)OC)[CH2:5][CH:6](C(=O)O)SC(=S)SCCCCCCCCCCCC`，其聚合度为102，主链两侧封端基团均为 `[*]=COCC`。主链的重复单元为一三嵌段共聚物支链，其中 `[*][CH2:1][CH:2](c2ccccc2)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:3][CH:4](C(=O)OC)[*]` 构成支链的一个重复单元，聚合度为28；`[*][CH2:5][CH:6](C(=O)O)[*]` 构成支链的一个重复单元，聚合度为76。](/media/uploads/5feb2693-f862-478c-99fe-325713ab7113.png)</MultiModal>

因此选择选项 F。