利用偶合反應法合成聚對苯乙烯-聚2 乙烯之 硬桿-柔曲塊狀共聚高分子及其自組裝特性研究

End-Coupling Synthesis of Poly (phenylene vinylene)-b-Poly (2-vinyl pyridine) Rod-Coil Block Copolymers and Their Self-Assembling Behavior

黃世豪(Shih-Hau Huang)

指導教授 ： 戴子安

國立臺灣大學/工學院/高分子科學與工程學研究所/碩士(2008年)

https://doi.org/10.6342/NTU.2008.01860

摘要

無資料

關鍵字

硬桿-柔曲塊狀共聚高分子 ； 聚對苯乙烯 ； 聚2 乙烯 ； 陰離子聚合 ； 尾端偶合反應 ； 自組裝行為

並列摘要

Recently, the self-assembling behavior of rod-coil block copolymers has been rapidly explored. In the thesis, an aldehyde-terminated poly(phenylene vinylene) (PPV) was
synthesized by Siegrist polycondensation method, and the polymer had a number average molecular weight of 5000g/mol with narrow polydispersity. In addition, a monodispersed
homopolymer living anion of poly(2-vinyl pyridine) (P2VP) was synthesized via anionic polymerization using sec-butyllithium as an initiator. Block copolymers of PPV-b-P2VP were synthesized by a nucleophilic addition reaction between P2VP living anion and aldehyde-terminated PPV. Five PPV-b-P2VP block copolymers with different PPV/P2VP molar ratio were successfully synthesized with high yield (>90%).
The synthesized PPV-b-P2VPs were characterized by using various techniques including gel permeation chromatography (GPC), UV-VIS, photoluminescence (PL), TGA
(thermogravimetric analysis) and differential scanning calorimetry (DSC). Furthermore, the self-assembling behavior of block copolymers was investigated by using TEM. Different microphase structures, e.g. lamellae, cylinders, and spheres were observed for different
compositions of the copolymers. In the end, we used the wide angle X-ray scattering technique to study the crystalline structure of PPV in the PPV-P2VP nanostructure. It was found that the crystallinity of PPV decreases with increasing P2VP molecular weight.

並列關鍵字

rod-coil block copolymer ； poly(phenylene vinylene) ； poly(2-vinyl pyridine) ； anionic polymerization ； end-coupling reaction ； self-assembling behavior

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