分段浇注大型聚氨酯密封件性能影响因素研究  

Study on Influence Factors of the Properties of Large Segment-casted Polyurethane Seal

作　　者：吴斌 游伟文 何伟文 陈小影 WU Bin;YOU Weiwen;HE Weiwen;CHEN Xiaoying(Guangzhou Mechanical Engineering Research Institute Co.Ltd,Guangzhou 510700,Guangdong,China;National Engineering Research Center of Rubber and Plastic Sealing,Guangzhou 510700,Guangdong,China)

机构地区：[1]广州机械科学研究院有限公司,广东广州510700 [2]国家橡塑密封工程技术研究中心,广东广州510700

出　　处：《聚氨酯工业》2021年第6期35-37,共3页Polyurethane Industry

基　　金：广东省引进创新创业团队项目(项目编号:2019BT02Z393)。

摘　　要：以聚四氢呋喃二醇为软段,4,4′-二苯基甲烷二异氰酸酯和1,4-丁二醇为硬段,合成密封件用大型浇注聚氨酯弹性体(CPU)。研究了异氰酸酯指数、原料温度、模具温度及分段浇注间隔时间对分段浇注聚氨酯密封件物性和接口质量的影响。结果表明:CPU分段浇注最佳工艺为异氰酸酯指数1.06,预聚体温度100℃,模具温度100℃,分段浇注间隔时间20 min,得到的聚氨酯密封件性能较好,接口性能良好。Casting polyurethane elastomer(CPU)for large segmental casted seals was synthesized by using polytetrahydrofuran diol as soft segment,4,4′-diphenylmethane diisocyanate and 1,4-butanediol as hard segment.The effects of isocyanate index,raw material temperature,mold temperature and interval casting time on the physical properties and interface quality of the CPU sealing material were studied.The results showed that the best parameters were isocyanate index 1.06,prepolymer temperature 100℃,mold temperature 100℃,interval casting time 20 min,respectively.The mechanical properties and interface properties of polyurethane seals prepared by segment-manufacturing technology were good.

关 键 词：浇注型聚氨酯弹性体 分段制造 分段浇注 聚氨酯密封件 

分 类 号：TQ333.95[化学工程—橡胶工业]