Compatibilizing Effect of Random or Block Copolymer Added to Binary Mixture of Homopolymers.
Compatibilizing Effect of Random or Block Copolymer Added to Binary Mixture of Homopolymers.
复制标题
添加到均聚物二元混合物中的无规或嵌段共聚物的增容作用。
DOI：
10.1021/ma00153a036
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发表时间：
1985
期刊：
影响因子：
5.5
通讯作者：
R. Roe
中科院分区：
文献类型：
--
作者：
D. Rigby;J. L. Lin;R. Roe
摘要：当将共聚物A-B加入到均聚物A和均聚物B的混合物中时，在一定条件下两种均聚物之间的相容性增强。基于Flory-Huggins混合自由能的分析给出了三元混合物的临界温度、旋节温度或双节温度预期随加入共聚物的量线性降低的具体条件。对聚苯乙烯和聚丁二烯的混合物的浊点的变化进行了实验测量，向该混合物中加入不同量的苯乙烯/丁二烯无规或二嵌段共聚物。结果与理论预期相符。通过对浊点下降的定量分析，确定了苯乙烯和丁二烯聚合物之间相互作用能密度的温度系数。温度系数被发现给一个很好的协议与先前确定的值由曲线拟合程序应用于二元混合物的浊点曲线。
Abstract : When copolymer A-B is added to the mixture of homopolymer A and homopolymer B, the compatibility between the two homopolymers is enhanced under certain conditions. Analysis, based on the Flory-Huggins free energy of mixing, gives the specific conditions under which the critical, spinodal or binodal temperature of the ternary mixture is expected to be lowered linearly with the amount of the added copolymer. Experimental measurements were performed on the changes in the cloud point of the mixtures of polystyrene and polybutadiene to which varying amounts of styrene/butadiene random or diblock copolymer were added. The results agree with the theoretical expectation. From quantitative analysis of the cloud point depression, the temeprature coefficient of the interaction energy density between styrene and butadiene polymers is determined. The temperature coefficient is found to give an excellent agreement with the value previously determined by a curve fitting procedure applied to the cloud point curves of binary mixtures.