摘要
本文用FTIR光谱仪研完聚醚聚氨酯/聚甲基丙烯酸甲酯(PU/PMMA)互穿聚合物网络(IPN)的初期反应动力学.实验结果表明:该体系IPN在生成过程中动力学不同步是造成相容性较差的原因之一,提高反应温度和增加PMMA的引发剂用量有利于反应同步进行.增加PMMA的含量,使PU反应速度加快是PMMA"溶剂效应”的结果;增加PU含量,使PMMA反应速度减慢是PU的“笼壁效应”结果.聚醚聚氨酯及聚甲基丙烯酸甲酯初期反应均属一级反应动力学.
Fourier transform infrared spectrograph was used to study the preliminary reaction kinetics of formation of PU/PMMA IPN. The reaction extent and kinetic constant were calculated by peak-area ratio method. It is found that the increase of the PMMA content accelerates the polymerization of PU due to the 'solvent effect' of PMMA, on the other hand, the increase of the PU content retards the polymerization of PMMA due to 'cage effect' of PU. The polymerization of both PU and PMMA is the first order reaction. The non-simultaneous kinetics makes the compatibility worse and raising the reaction temperature and increasing the amount of the initiator are favourable to the simultaneous reaction.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第1期120-123,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
