硬段结构对聚氨酯弹性体操作性能及力学性能的影响  

The Effect of Hard Segment Structure on Processing Performance and Mechanical Properties of Polyurethane Elastomers

作　　者：李春涛 叶小机 唐兴 LI Chuntao;YE Xiaoji;TANG Xing(Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals,China National Analytical Center,Guangzhou,Guangdong 510070,China;AECC Xi′an Aero-Engine Ltd,Xi′an,Shaanxi 710021,China)

机构地区：[1]中国广州分析测试中心广东省化学危害应急检测技术重点实验室,广东广州510070 [2]中国航发西安航空发动机(集团)有限公司,陕西西安710021

出　　处：《聚氨酯工业》2018年第5期41-43,共3页Polyurethane Industry

基　　金：广东省科学院实施创新驱动发展能力建设(2018GDASCX-0922);广东省科技计划项目(2016B020211004)

摘　　要：采用预聚体法制备了3种不同硬段结构的浇注型聚氨酯弹性体,研究了不同硬段结构对聚氨酯操作性能及力学性能的影响。结果表明,以MDI-50/MOCA作为硬段结构的聚氨酯体系黏度随时间增加较快,釜中寿命短,操作性差;以MDI-100/BDO、TDI-100/MOCA为硬段结构的聚氨酯体系,初期黏度随着时间变化增长较为缓慢,后期黏度增加较快。在力学性能方面,基于TDI-100/MOCA的弹性体的硬度、拉伸强度及伸长率表现最好,基于MDI-100/BDO的弹性体强度低、永久变形大,但回弹性能好。Three polyurethane elastomers with different hard-segment were prepared using the prepolymerization method.The processing and mechanical properties of polyurethanes were studied.The results showed that,the viscosity of the polyurethane based on MDI-50/MOCA increased fastly with time,having a short pot life.The polyurethane system with hard segment structure of MDI-100/BDO and TDI-100/MOCA showed slow initial viscosity increasing and fast late viscosity increasing.The hardness,tensile strength and elongation at break of TDI-100/MOCA system were the best,and the mechanical strength of MDI-100/BDO system was lower,the permanent deformation was large,but resilience performance was excellent.

关 键 词：聚氨酯弹性体 浇注型 硬段结构 操作性能 力学性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]