复合型非双折射性树脂的制备与分析

Preparation and Analysis of Synthesis Zero-birefringence Polymers

高分子树脂聚甲基丙烯酸甲酯PMMA和聚甲基丙烯酸异辛酯PEHMA的结合链因外力发生取向,易产生类似于单轴晶体的双折射,而两者的结合链在取向方向时呈现相反的双折射率。文章通过将互为异性的双折射性树脂甲基丙烯酸甲酯(MMA)和甲基丙烯酸异辛酯(EHMA)以一定比例混合,经过热引发合成复合型低双折射率的光学聚合树脂材料。研究发现,树脂的双折射率从3.4×10-4下降到5.1×10-5,说明正负双折射性树脂混合可以抵消或降低树脂因外力作用而产生的双折射,且优化配比为混合质量约65MMA。

By external orientation, high-molecular resins polymethylmethacrylate （PMMA） and poly methyl methacrylate isooctyl （PEHMA） are likely to form birefringence like uniaxial crystals, and their marriage chains have opposite birefringence. The synthesis zero-birefringence polymers are formed under thermal initiation by mixing opposite birefringence resins MMA and EHMA with certain ratio in this paper. The results show： birefringenee of polymers drop from 3.4 × 10 ^-4 to 5. 1 × 10^ -5, that by mixing resins with op- posite birefringenee can counteract or reduce birefringence of resins, and the optimized ratio is 65 % mass fraction of MMA.