文献类型：期刊文献

中文题名：生物基聚碳酸酯的合成及其光学特性调控

英文题名：Synthesis and Optical Regulation of Bio-Based Polycarbonates

作者：周乾[1];陆韬[1];刘梦娟[1];方炜[1];吴国章[1]

机构：[1]华东理工大学材料科学与工程学院,上海市先进聚合物重点实验室,上海200237

年份：2025

卷号：51

期号：3

起止页码：329

中文期刊名：华东理工大学学报(自然科学版)

外文期刊名：Journal of East China University of Science and Technology

收录：;北大核心:【北大核心2023】；

语种：中文

中文关键词：聚碳酸酯;双折射;异山梨醇;共聚改性;光学薄膜

外文关键词：polycarbonate;birefringence;isosorbide;copolymerization modification;optical film

摘要：生物基聚碳酸酯(PIC)受到分子链内刚性脂环骨架和醚键的限制,导致其折射率低、双折射值和吸水率偏高。本文以碳酸二苯酯(DPC)、9,9-二[4-(2-羟乙氧基)苯基]芴(BPEF)和异山梨醇(ISB)为原料,通过熔融酯交换法合成了高分子量、无规分布的生物基共聚碳酸酯(PFIC)。9,9-二芳基芴(Cardo)结构单体BPEF的引入,使PFIC具有比PIC更优异的光学性能、力学性能、热稳定性和疏水性。当BPEF摩尔分数为22%~70%时,PFIC薄膜呈现负色散特性;当BPEF摩尔分数为65%时,PFIC薄膜具有高折射率(n_(d)=1.620)和低双折射效应(Δn=0.000 07)。此外,PFIC的分子链取向度及其双折射值随着薄膜拉伸温度降低、拉伸比和拉伸速率提高而增加,但并不影响其双折射波长色散性。
Bio-based polycarbonate(PIC)is limited by the rigid alicyclic skeleton and ether bond in the molecular chain,which leads to a low refractive index,high birefringence value and high water absorption.In this study,the high molecular weight and random distribution of bio-based copolycarbonate(PFIC)were synthesized from diphenyl carbonate(DPC),9,9-bis[(4-(2-hydroxyethoxy)phenyl]fluorene(BPEF)and isosorbide(ISB)by melt transesterification.The addition of Cardo monomer BPEF gives PFIC better optical properties,mechanical properties,thermal stability and hydrophobicity than PIC,thereby broadening the application of bio-based polycarbonate in the field of optical films.When the molar fraction of BPEF ranges from 22%to 70%,the PFIC films exhibit negative dispersion characteristics.Specifically,when the molar fraction of BPEF is 65%,this PFIC film demonstrates high refractive index(n_(d)=1.620)and low birefringence(Δn=0.00007).Furthermore,the orientation and birefringence value of PFIC films increase with the decrease of draw temperature,the increase of draw ratio and draw speed,but the birefringence wavelength dispersion is not affected.The result lays an experimental foundation for regulating the optical properties of polycarbonate films.