PCDL-PBT热塑性弹性体的合成及性能表征  

Synthesis and performance characterization of PCDL-PBT thermoplastic elastomer

作　　者：杨钟[1] Yang Zhong(Research Institute of Sinopec Yizheng Chemical Fibre Co.,Ltd.,Yizheng Jiangsu 211900,China)

机构地区：[1]中国石化仪征化纤有限公司研究院,江苏仪征211900

出　　处：《合成技术及应用》2024年第3期7-11,共5页Synthetic Technology & Application

摘　　要：采用聚碳酸酯二元醇(PCDL)为软段,对苯二甲酸(PTA)和1,4-丁二醇(BDO)共聚物为硬段,合成了一系列PCDL-PBT型热塑性弹性体。通过红外光谱仪表征了弹性体的化学结构,采用差示扫描量热仪以及热重分析仪测试了弹性体的热性能,并测试了其流动性能、动态热机械性能及力学性能。结果表明:合成的聚碳酸酯型弹性体具有良好的热稳定性能;随着弹性体中PCDL含量的增加,其玻璃化转变温度(T_(g))和熔点(T_(m))逐渐降低;弹性体的断裂强度呈现下降趋势,断裂伸长率出现先升高后降低的趋势;弹性体的储能模量下降,损耗因子升高并且向低温方向移动,tanδ峰值由0.157升高至0.284。Polycarbonate Diol(PCDL)was used as the soft segment and terephthalic acid(PTA)and 1,4-bu-tanediol(BDO)copolymer as the hard segment to create a series of PCDL-PBT thermoplastic elastomers.Infrared spec-troscopy was used to characterize its chemical structure,diferential scanning calorimetry and thermogravimetric analysis were used to investigate its thermal properties.Tests were conducted on its flow characteristics,dynamic thermomechani-cal properties,and mechanical properties.The outcomes demonstrate the good thermal stability performance of the syn-thetic polycarbonate type elastomer.PCDL's glass transition temperature and melting point progressively drop as its mass fraction in the copolymer rises.The copolymer's fracture strength exhibits a declining trend,while the fracture elonga-tion displays a trend of initial increase followed by decrease.The loss tangent value increased from 0.157 to 0.284 as the copolymer's storage modulus decreased and the loss factor increased as it moved towards lower temperatures.

关 键 词：热塑性弹性体 聚碳酸酯二元醇 热性能 动态热机械性能 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]