Stereoregular Diblock Copolymers of Syndiotactic Polystyrene Derivatives and Polylactide: Syntheses and Self-Assembled Nanostructures

被引:10
|
作者
Hsiao, Ting-Jui [1 ]
Lee, Jing-Yu [1 ]
Mao, Yung-Cheng [1 ]
Chen, Yu-Chin [1 ]
Tsai, Jing-Cherng [1 ]
Lin, Shih-Chieh [2 ]
Ho, Rong-Ming [2 ]
机构
[1] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi 62142, Taiwan
[2] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30013, Taiwan
关键词
SYNDIOSPECIFIC LIVING POLYMERIZATION; SIMULTANEOUS POLYOLEFIN BRANCH; CHIRAL BLOCK-COPOLYMER; CRYSTAL-STRUCTURE; ETHYLENE POLYMERIZATION; ISOTACTIC POLYPROPYLENE; CLATHRATE FORM; THIN-FILMS; STYRENE; POLY(P-METHYLSTYRENE);
D O I
10.1021/ma102048v
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Structurally well-defined stereoregular diblock copolymers, syndiotactic poly(4-methylstyrene)-b-poly(L-lactide) (sPMS-b-PLLA), were prepared by the controlled ring-opening polymerization of an aluminum alkoxide end-capped sPMS macroinitiator with L-lactide. The aluminum alkoxide end-capped sPMS macroinitiator was generated via the reaction between hydroxyl-capped sPMS and triethylaluminum. The hydroxyl-capped sPMS Was prepared from the hydroboration of ethenyl-capped sPMS. The ethenyl-capped sPMS was generated by the desilylation of dimethylphenylvinylsilane-capped sPMS prepared via a unique vinylsilane-inducing selective chain transfer reaction during the syndiospecific polymerization of 4-methylstyrene conducted in the presence of dimethylphenylvinylsilane using Cp*Ti-(OMe)(3)/MAO as catalyst. The proposed synthetic method can be used for the preparation of a broad variety of end-functionalized syndiotactic polystyrene derivatives (syndiotactic polystyrenes) end-capped with various end groups and facilitates the synthesis of syndiotactic polystyrenes-based stereoregular BCPs. The method offers effective control over the stereoregularity of polystyrenes and facilitates linking between blocks to provide stereoregular BCPs, which are capable of generating well-ordered nanostructures resulting from the self-assembly of stereoregular BCPs, as evidenced by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM).
引用
收藏
页码:286 / 298
页数:13
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