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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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tdi-tmp合成反应动力学研究
Keywords: 聚氨酯固化剂,动力学,甲苯二异氰酸酯,三羟甲基丙烷
Abstract:
？在不加催化剂的条件下用化学分析法研究了甲苯二异氰酸酯（tdi）和三羟甲基丙烷（tmp）的反应动力学，结果表明：—nco与—oh的反应属于二级反应，由于tdi中对位—nco基（c4—nco）和邻位—nco基（c2，6—nco）反应活性的差异，在动力学曲线上呈现出一个明显的折点，该折点被认为是c4—nco和c2，6—nco反应活性的分界点。同时计算了不同温度下c4—nco和c2，6—nco的反应速率常数（k1，k2）和活化能（ea1，ea2），随着温度的升高，c4—nco和c2，6—nco反应活性都增加但两者的差异逐渐减小。同时还研究了不同—nco和—oh配比下反应动力学。
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