| 胆甾醇基液晶功能化SBS弹性体的合成与性能研究 |
| Synthesis and Properties of Cholesterol-based Liquid Crystal Functionalized SBS Elastomers |
| 投稿时间：2023-05-27 修订日期：2023-05-27 |
| DOI：10.12136/j.issn.1000-890X.2024.12.0883 |
| 中文关键词: 活性阴离子聚合 苯乙烯-丁二烯-苯乙烯嵌段共聚物 液晶弹性体 相对分子质量 液晶织构 热性能 |
| 英文关键词: active anionic polymerization styrene-butadiene-styrene block copolymer liquid crystal elastomer molecular weight liquid crystal texture thermal property |
| 基金项目:中国博士后基金面上项目（2022M711455）；辽宁省自然科学基金联合基金面上项目（DUT24MS011）；国家自然科学基金面上项目（22271041） |
|
| 摘要点击次数: 188 |
| 全文下载次数: 59 |
| 中文摘要: |
| 基于活性阴离子聚合方法，以苯乙烯和丁二烯为共聚单体，以四氯化硅为偶联剂，通过顺序加料法和星形偶联法，设计合成了不同数均相对分子质量（12.2～66.5 kg·mol-1）和组成的星形苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS），其相对分子质量分布指数为1.03～1.20，并选取牌号为SBS-791，SBS-792，SBS-LG（数均相对分子质量为91.5～131.1 kg·mol-1，相对分子质量分布指数为1.07～1.39）的商品化线性SBS，将设计合成的硅氢末端的胆甾醇基液晶单体[Chol-SiH（M）]接枝到SBS的聚丁二烯嵌段上，制备了结构和接枝密度相似、相对分子质量和组成不同的胆甾醇基液晶功能化SBS弹性体（SBS-LC）。采用配置四检测器的凝胶渗透色谱仪和氢核磁共振仪对SBS及SBS-LC的相对分子质量和微观结构进行了分析，采用偏光显微镜和差示扫描量热仪对SBS-LC的液晶织构和热性能进行了分析，建立了SBS-LC的结构与性能的构-效关系，为液晶功能化高分子材料的设计与应用打下了基础。 |
| 英文摘要: |
| Based on the active anionic polymerization method，styrene and butadiene as the copolymerized monomer，silicon tetrachloride as the coupling agent，by sequential loading method and star coupling method，the star styrene-butadiene-styrene block copolymers（SBS） with different number average molecular weights（12.2～66.5 kg·mol-1） and compositions were designed and synthesised，their molecular weight distributions index（PDI） was in the range of 1.03～1.20，in addition，commerciallized linear SBS products with brands SBS-791，SBS-792，SBS-LG （with the number average molecular weights of 91.5～131.1 kg·mol-1 and the PDI of 1.07～1.39） were selected，the designed and synthesized Cholesterol-based liquid crystal monomer with the end of SiH was grafted onto polybutadiene block of the SBS，and the chololesterol-based liquid crystal functionalized SBS elastomers（SBS-LC） with similar structures and grafting densities and different molecular weights and compositions were prepared.The molecular weight and microstructure of the SBS and the SBS-LC were analyzed by gel permeation chromatograph and hydrogen nuclear magnetic resonance instrument with four detectors，the liquid crystal texture and thermal properties of the SBS-LC were analyzed by polariztion microscope and differential scanning calorimeter，and the structure-activity relationship between structure and properties of the SBS-LC was established，which laid the basis for the design and application of the liquid crystal functional polymer materials. |
|
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
