摘要
提出了钛白表面苯乙烯固相接枝改性新工艺，并对工艺的各主要影响因素进行了较为详细的研究，得出了最佳的丁艺条件．在此基础上，分析研究了力化学法钛白表面苯乙烯固相接枝改性机理，认为钛白苯乙烯改性的作用机理是负离子聚合反应和自由基聚合反应；钛白和改性剂的性能是该工艺能够实施的内因和热力学因素，搅拌磨中的机械力化学作用、引发剂的化学作用、外加热和自生热以及由此产生的体系温度变化是该工艺能够实施的外因和重要动力学因素，由外因和内因的共同作用使这一工艺得以顺利高效进行．
A new technology of styrene grafting surface modification of titanium dioxide is introduced. The main technological parameters have been studied, and the optimal combination of the parameters has been obtained. The modification mechanisms were analyzed that the process of styrene grafting surface modifica- tion of titanium dioxide is essentially a combination of negative ion polymerization and free radical pol- ymerization, there is C-O bonds create on the surface of modified titanium dioxide. Whereas the mechanical- chemical effects caused by stirring mill, the chemical effects caused by initiating agent, the external and inter- nal heating can all promote the modification process.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2002年第2期119-122,共4页
Journal of University of Science and Technology Beijing
基金
教育部博士点基金资助项目(No.97000805)
关键词
固相
钛白
苯乙烯
接枝改性
机理
工艺
titanium dioxide
styrene
grafting modification
mechanism
