Effect of molecular weight on photoinduced birefringence in a chiral liquid crystalline azodye polymer

被引：5
作者：
Kozlovsky, M
Lazarev, VV
机构：
[1] Tech Univ Darmstadt, Inst Phys Chem, D-36487 Darmstadt, Germany
[2] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2006年 / 27卷 / 05期
关键词：
azo polymers; degree of polymerization (DP); liquid-crystal line polymers (LCP); photoinduced birefringence;
D O I：
10.1002/marc.200500669
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The evolution of the photoinduced birefringence in thin films of narrow polymer fractions is studied and compared with the behavior of the non-fractionated polymer. The Delta n(ind) value decreases by increasing the degree of polymerization (DP) within the oligomeric range but becomes independent of molecular weight starting from a DP of approximate to 70. Thermal pretreatment of the films results in higher photoinduced birefringence. The films show good stability of the photorecording.
引用
收藏
页码：361 / 365
页数：5
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