聚己内酯增强生物基聚酯弹性体  

Polycaprolactone Strengthening Bio-Based Polyester Elastomer

作　　者：王浩宇 李文倩 张奇男[3] 李佳欢 王朝[3] 康海澜 方庆红[1,2] Haoyu Wang;Wenqian Li;Qinan Zhang;Jiahuan Li;Zhao Wang;Hailan Kang;Qinghong Fang(School of Materials Science and Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China;Key Laboratory for Rubber Elastomer of Liaoning Porovince,Shenyang University of Chemical Technology,Shenyang 110142,China;State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]沈阳化工大学,材料科学与工程学院,辽宁沈阳110142 [2]沈阳化工大学,辽宁省橡胶弹性体重点实验室,辽宁沈阳110142 [3]北京化工大学有机无机复合材料国家重点实验室,北京100029

出　　处：《高分子材料科学与工程》2021年第10期62-69,共8页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51703133);辽宁省高等学校创新人才支持计划(LR2019053);辽宁省自然科学基金资助项目(2019-MS-263)。

摘　　要：针对生物基聚酯弹性体(BEE)力学性能较差的问题,采用聚己内酯(PCL)作为BEE的增强相,通过溶液共混及橡胶传统硫化工艺,制备了具有较高力学性能的生物基BEE/PCL硫化胶。通过动态力学性能、扫描电镜、差示扫描量热法、X射线衍射、力学性能测试等,对BEE/PCL硫化胶的相容性、微观相态、热性能及结晶性能、力学性能进行了表征。BEE/PCL硫化胶只有1个玻璃化转变温度,为热力学相容体系,但扫描电镜分析结果表明,BEE/PCL硫化胶为微观相分离体系。随着PCL含量的增加,BEE/PCL硫化胶的结晶度逐渐增加,拉伸强度逐渐增加,断裂伸长率先增加后降低。研究发现,当BEE与PCL的质量比为8∶2,BEE/PCL硫化胶的力学性能较优,拉伸强度为5.1 MPa、断裂伸长率为292%。Since bio-based polyester elastomer(BEE) exhibits poor mechanical properties, polycaprolactone(PCL) was adopted to strengthen BEE and prepared a new typed bio-based BEE/PCL vulcanizates with high mechanical properties through solution blend and traditional vulcanizing process. Dynamic mechanical thermal analysis(DMA), scanning electron microscopy(SEM), differential scanning calorimeter(DCS), X-ray diffraction(XRD) and mechanical tests were used to characterize the compatibility, microstructure, thermal and crystallization properties, and mechanical properties of BEE/PCL vulcanizates. BEE/PCL vulcanizates exhibit only one glass transition temperature, which is a thermodynamic compatible system;however, SEM results show that BEE/PCL vulcanizate is a microphase-separated system. With the increase of PCL content, the crystallinity and tensile strength of BEE/PCL vulcanizates gradually increase, and the elongation at break firstly increases and then decreases. When the mass ratio of BEE to PCL is 8∶2, BEE/PCL vulcanizates present the optimal mechanical properties with the tensile strength of 5.1 MPa and the elongation at break of 292%.

关 键 词：聚己内酯 生物基聚酯弹性体 相容性 增强 

分 类 号：TQ334.1[化学工程—橡胶工业]