摘要
采用动态流变学方法,对聚甲基丙烯酸甲酯(PMMA)/聚(苯乙烯-马来酸酐)(PSMA)共混体系的相行为进行了研究.相分离温度由动态储能模量对温度曲线斜率的转折点确定.结果表明,表观相分离温度有很大的频率依赖性,因此,动态流变学方法应用于相分离温度测定时要外推到频率为零.
The dynamic viscoelasticity of poly （methyl methacrylate ） （ PMMA ）/poly （ styrene-co-maleic anhydirde） （SMA） blends in the molten state was investigated change in slope of the storage modulus and the occurrence of a The apparent phase separation was marked by a peak in the loss tangent as a function of temperature. It was found that the apparent phase separation temperatures are strongly dependent on the frequency applied. The phase separation temperature obtained through extrapolation to zero frequency was lower than the cloud point by turbidity method.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期166-169,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20490220
50390090
20204007)资助
