| 基于PTMG-TDI的低游离TDI浇注型PU弹性体的制备与性能研究 |
| Preparation and property of PTMG-TDI based castable polyurethane elastomer with low free TDI monomer |
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| DOI： |
| 中文关键词: 四氢呋喃均聚醚 甲苯二异氰酸酯 浇注型聚氨酯弹性体 低游离型 工艺性能 物理性能 动态性能 |
| 英文关键词: PTMG TDI castable polyurethane elastomer low free type processibility physical property dynamic property |
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| 中文摘要: |
| 以四氢呋喃均聚醚和甲苯二异氰酸酯为原料，采用分子蒸馏法合成PU预聚体，以3，3'-二氯-4，4'-二氨基二苯甲烷为扩链剂制备低游离甲苯二异氰酸酯浇注型PU弹性体，并对其性能进行研究。结果表明，与常规PU预聚体与扩链剂的混合体相比，低游离PU预聚体与扩链剂的混合体具有良好的流动性和较快的固化速度；低游离PU弹性体与常规PU弹性体拉伸强度和撕裂强度相差不大，但前者回弹值较大、压缩永久变形较小、动态性能较好。 |
| 英文摘要: |
| Using PTMG and TDI as raw materials，a polyurethane(PU) prepolymer was synthesized by molecular distillation method，then a castable PU elastomer with low free TDI monomer was prepared with 3，3'-dichloro-4，4'diamino diphenylmethane chain extender，and its properties were investigated.The results showed that，the PU prepolymer and chain extender mixture possessed good flow behaviour and faster curing rate compared with general PU prepolymer；the tensile strength and tear strength were similar to those of general PU elastomer，but resilience was higher，compression set was lower and dynamic property was better. |
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