基于羟脯氨酸聚酯的热塑弹性体的合成与性质研究  

Synthesis and Applications of Hydroxyproline-derived Thermoplastic Elastomers

作　　者：张意 吕华[1] Yi Zhang;Hua Lu(Beijing National Laboratory for Molecular Sciences,Key Laboratory of Polymer Chemistry and Physics Education Ministry,Center for Soft Matter Science and Engineering of Peking University,Institute of Chemistry and Molecular Science,Peking University,Beijing 100871)

机构地区：[1]北京大学化学与分子工程学院北京分子科学国家研究中心,高分子化学与物理教育部重点实验室北京大学软物质中心,北京100871

出　　处：《高分子学报》2022年第9期1123-1130,共8页Acta Polymerica Sinica

基　　金：国家杰出青年科学基金(基金号NSFC22125101)资助项目。

摘　　要：基于羟脯氨酸,制备了刚性的桥环内酯单体(N-HPL),将其与商业可得的ε-己内酯、δ-戊内酯共聚,一锅多步法制备得到具有“硬-软-硬”结构的三嵌段共聚物BP1-3.改变N-HPL在聚合物中的含量,能方便地调节BP1-3的成分比例与物理性质.该系列嵌段共聚物经热压即能制备得到透明的弹性体薄膜材料,并在单轴拉伸实验中表现出显著的弹性.A hydroxyproline-derived bridged bicyclic lactone monomer(N-HPL)was prepared and copolymerized with the commercially availableε-caprolactone(CL)andδ-valerolactone(VL).In a one pot fashion,N-HPL was fed as the hard segment after the complete conversion of CL and VL in the polymerization,to generate a series of ABA triblock copolyesters BP1-3.The composition and physical properties of BP1-3 can be facilely tuned by adjusting the content and ratio of Nn Hex-HPL.BP1-3 can be processed with hot pressing to obtain transparent films and samples with characteristic properties of thermoplastic elastomer.The material has a melting point nearly200℃,which corresponds to a higher upper limiting temperature in its applications.Mechanical tests,mainly uniaxial tensile tests,show the material can obtain Young’s modulus over 20 MPa and toughness as high as 100 MJ·m,which are comparable to most reported thermoplastic elastomer polyesters.

关 键 词：羟脯氨酸 桥环内酯 嵌段共聚物 聚酯弹性体 

分 类 号：TQ334[化学工程—橡胶工业]