Cyclic Olefin Copolymer Bearing Pendant Fluorenyl Groups with High Refractive Index and Low Chromatic Dispersion

被引：16
|
作者：
Yuan, Haobo [1 ]
Kida, Takumitsu [2 ]
Ishitobi, Yuma [1 ]
Tanaka, Ryo [1 ]
Yamaguchi, Masayuki [2 ]
Nakayama, Yuushou [1 ]
Shiono, Takeshi [1 ]
机构：
[1] Hiroshima Univ, Grad Sch Adv Sci & Technol, Higashihiroshima 7398527, Japan
[2] Japan Adv Inst Sci & Technol, Sch Mat Sci, Mat Chem Area, Nomi, Ishikawa 9231292, Japan
来源：
MACROMOLECULES | 2022年 / 55卷 / 01期
关键词：
POLYMERS; NORBORNENE; COMPLEX;
D O I：
10.1021/acs.macromol.1c02101
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Copolymerization of norbornene (NB) and fluorene-containing alkene comonomers using the Me2Si(Flu)((NBu)-Bu-t)-TiMe2 complex as a catalyst was investigated. The copolymerization successfully proceeded at any monomer feed ratio in high activity and gave copolymers with various comonomer contents. The structure of these copolymers would be gradient because NB was preferentially consumed in a quasi-living polymerization system. Two relaxation processes at 100-150 and 270-300 degrees C in dynamic mechanical analysis, which show phase-separation of the copolymer, supported the formation of the gradient structure. The obtained copolymers showed a high refractive index as hydrocarbons and extremely low photoelasticity (<10(-11) Pa-1). For reducing the photoelasticity, a monomer design free from reactive tertiary carbons would be important.
引用
收藏
页码：125 / 132
页数：8
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