聚苯乙烯-<em>嵌段-</em>聚（乙烯醇）二嵌段聚合物模型的简单合成<a href="#fn1" title="可用的电子补充信息（ESI）：详细的表征数据，例如SEC，NMR，FT-IR，TGA，DSC和AFM。参见DOI：10.1039 / c8py00937f">†</a>,Polymer Chemistry

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聚苯乙烯-嵌段-聚（乙烯醇）二嵌段聚合物模型的简单合成 †
Polymer Chemistry ( IF 4.1 ) Pub Date : 2018-07-31 00:00:00 , DOI: 10.1039/c8py00937f
Ozcan Altintas _{1,

2,

3,

4} , Joshua C. Speros _{4,

5,

6} , Frank S. Bates _{2,

3,

4,

7} , Marc A. Hillmyer _{1,

2,

3,

4}

Affiliation

我们报告了结合使用定义明确的聚苯乙烯-嵌段-聚（乙烯醇）（PS- b - PVA）聚合物和相应的聚苯乙烯-嵌段-聚（乙酸乙烯酯）（PS- b - PVAc）前体的合成和表征原子转移自由基聚合（ATRP），铜催化的叠氮化物炔烃环加成反应和可逆加成-断裂链转移（RAFT）聚合的研究。首先使用通过电子转移ATRP再生的活化剂制备溴末端官能的聚苯乙烯。通过相应叠氮化物官能的聚苯乙烯与炔烃官能的O-乙基之间的CuAAC反应，可得到带有三唑基R-基团的黄药介导的大链转移剂。S-丙-2-炔基二硫代碳酸盐。使用基于三唑的大分子CTA通过RAFT聚合合成了PS- b - PVAc二嵌段聚合物。形成明确的PS- b - PVA二嵌段聚合物之后，进行¹ H核磁共振光谱，红外光谱和尺寸排阻色谱。通过热重分析和差示扫描量热法分析了二嵌段聚合物的热性质。水解PVAc链段，得到相应的PS- b - PVA嵌段聚合物。通过掠入射小角散射以及原子力显微镜研究了聚合物的形态。

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Straightforward synthesis of model polystyrene-block-poly(vinyl alcohol) diblock polymers†

We report the synthesis and characterization of well-defined polystyrene-block-poly(vinyl alcohol) (PS-b-PVA) polymers and the corresponding polystyrene-block-poly(vinyl acetate) (PS-b-PVAc) precursors using a combination of atom transfer radical polymerization (ATRP), copper-catalyzed azide alkyne cycloaddition reaction, and reversible addition–fragmentation chain transfer (RAFT) polymerization. Bromine end-functional polystyrene was first prepared using activators regenerated by electron transfer ATRP. A xanthate mediated macro chain transfer agent carrying a triazole-based R-group was achieved by the CuAAC reaction between the corresponding azide-functional polystyrene and an alkyne functional O-ethyl S-prop-2-ynyl carbonodithioate. PS-b-PVAc diblock polymers were synthesized by RAFT polymerization using the triazole-based macro-CTA. The formation of well-defined PS-b-PVA diblock polymers was followed by ¹H nuclear magnetic resonance spectroscopy, infrared spectroscopy and size-exclusion chromatography. Thermal properties of the diblock polymer were analyzed by thermal gravimetric analysis and differential scanning calorimetry. The PVAc segments were hydrolyzed to give the corresponding PS-b-PVA block polymers. The morphology of the polymers was investigated by grazing-incidence small-angle scattering as well as atomic force microscopy.

更新日期：2018-07-31

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