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聚氨酯纳米CaCO3复合材料的冲蚀磨损性能研究


西华大学毕业论文 聚氨酯/纳米 CaCO3 复合材料的冲蚀磨损性能研究 材料科学与工程专业 学生:*** 指导老师:*** 摘 要 本文以甲苯-2、4-二异氰酸酯(TDI)、聚四氢呋喃醚二醇—1000(PTMG)、 3,3-二氯-4,4-二苯基甲烷二胺(MOCA)为原料,采用预聚法合成浇注聚氨酯 弹性体。选用纳米 CaCO3 粒子颗粒对聚氨酯弹性体进行强化,并且以微米 Si3N4 粒子作为对比组,对试样进行了力学性能和磨损性能的测试。 实验结果表明:纳米 CaCO3 粒子对纯聚氨酯弹性体的力学性能有一定的提 高, 并且纳米 CaCO3 粒子含量为 1%时最佳; 聚氨酯纳米 CaCO3 复合材料综合力 学性能和磨损性能要比微米 Si3N4 复合材料好。 关键词:聚氨酯;纳米碳酸钙;力学性能;分散性;表面改性 1 西华大学毕业论文 Abstracts In this paper,polyurethane nano-composites were prepared prepolymer which was synthesized from diisocyanate(TDI), polytetrahydrofuran(PTMG), aromatic diamine(MOCA) firstly. Then the prepolymer was prepared by prepolymerization process , and the properties of polyurethane elastomer was strengthened by nano-CaCO3 ,The mechanical properties and erosion wear of the polyurethane nano-composite were tested and compared with the micron-Si3N4 composite. The results showed that the mechanical properties of polyurethane composite were enhanced by nano-CaCO3, it had the best properties when the composite had and 1% nano-CaCO3. The mechanical properties and erosion wear of PU/ nano-CaCO3 composite were better than PU/micron-Si3N4 composite. Keywords : Polyurethane, Nano-CaCO3, Mechanical Properties, Dispersity, Surface modification 2 西华大学毕业论文 目 录 第 1 章 绪 论 ............................................................................................................... 1 1.1 引言······································ ····································· 1 ····································· 1.2 聚氨酯/纳米 CAC

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