【摘要】 以聚ε-己内酯(PCL-210N)、甲苯二异氰酸酯(TDI)和3,3′-二氯-4,4′-二氨基二苯基甲烷(MOCA)为原料,有机硅二醇为改性材料,通过预聚物法合成了一系列有机硅化学改性聚氨酯弹性体。分别用红外光谱测试、应力-应变测试、热重测试、差示扫描量热测试、扫描电镜、接触角以及动态力学测试等对其性能进行了研究。红外分析表明有机硅成功接入到聚氨酯分子中;扫描电镜表明有机硅向体系表面迁移并富集;改性聚氨酯弹性体的硬度、拉断伸长率、拉伸强度、100%和300%定伸模量及撕裂强度均有一定程度的提高,其吸水率由1.46%降至1.21%,接触角由78.69°升至101.97°,疏水性能提高;另外,其耐热性能也有所改善。更多还原

【Abstract】 A series of silicone modified polyurethane elastomers were synthesized through the prepolymer method by the materials of polycaprolactone glycol(PCL-210N),2,4-toluene diisocyanate(TDI)and chain extender-3,3′-bis-chloro-4,4two amino two phenyl methane(MOCA),as well as the modified material-silicone glycol.The properties were respectively studied by FTIR,stress strain test,thermogravimetric analysis,differential scanning calorimetry,scanning electron microscopy,contact angle and dynamic mechanical test.The results showed that,the mechanical properties,thermal stability as well as the hydrophobic properties were improved with the increase of the content of silicone glycol.更多还原