厦门大学学报（自然科学版）2017，Vol.56Issue(3)：370-377,8.DOI:10.6043/j.issn.0438-0479.201604057
热塑性聚氨酯弹性体的老化机理
The Aging Mechanism of Thermoplastic Polyurethane Elastomer
杨慧 1王相鹏 1郑津 1薛惠芸 1丁玲 1李志辉 1邹友思1
作者信息
摘要
Abstract
In this investigation,FT-IR、1H-NMR and UV-Vis spectroscopy were used to study aging behaviors of a thermoplastic polyurethane elastomer(TPU) as a result of UV irradiation,microwave and thermal oxidation,respectively.It was found that TPU exposed to microwave and thermal oxidation had the same aging mechanism.TPU had a post-curing at first,then isocyanurate groups reacted with the primary amine to form the carbamido,and further reacted to form biuret groups.In the presence of microwave for 30 min,the absorption of microwave induced degradation of TPU and formation of poly(butylene adipate)(PBA).The microwave aging was so efficient that TPU had the same changes after microwave aging for 15 min as those after thermal oxidative aging for 600 h.There were no structural changes of TPU caused by UV irradiation,except that the concentration of hydrogen-bonded urethane carbonyl groups had a tendency to higher values with increasing irradiation time.Moreover,formation of the enamine led to the yellowing of TPU.关键词
热塑性聚氨酯弹性体/紫外光老化/微波老化/热氧老化/老化机理Key words
thermoplastic polyurethane elastomer (TPU)/UV irradiation aging/microwave aging/thermal oxidative aging/aging mechanism分类
化学化工引用本文复制引用
杨慧,王相鹏,郑津,薛惠芸,丁玲,李志辉,邹友思..热塑性聚氨酯弹性体的老化机理[J].厦门大学学报（自然科学版）,2017,56(3):370-377,8.
