EFFECT OF SEQUENCE DISTRIBUTION ON THE MISCIBILITY OF POLYMER COPOLYMER BLENDS
EFFECT OF SEQUENCE DISTRIBUTION ON THE MISCIBILITY OF POLYMER COPOLYMER BLENDS
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DOI：
10.1021/ma00153a021
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发表时间：
1985-01-01
期刊：
影响因子：
5.5
通讯作者：
MACKNIGHT, WJ
中科院分区：
文献类型：
--
作者：
BALAZS, AC;SANCHEZ, IC;MACKNIGHT, WJ
以往描述共聚物共混物相行为的理论都忽略了共聚物中单体单元的序列分布。我们引入了一个参数，描述了二元序列分布的单体在共聚物链。通过变化，我们可以描述嵌段、无规或交替共聚物。假定均聚物C的单体与共聚物AB中的单体A（或B）之间的相互作用能由化学键合到A（或B）结构单元的最近邻介导。发现序列分布可能显著影响聚合物AB和C之间的相容性程度。对于一个固定的组成，有一个最佳的范围的值（或序列分布）的C/AB系统是可混溶的。
Previoustheories describing the phase behavior of copolymer blends have ignored the sequence distribution of monomer units in the copolymer. We introduce a parameter,, that describes the binary sequence distribution of the monomers in a copolymer chain. By varying, we can describe a block, random, or alternating copolymer. It is assumed that the interaction energy between a monomer of homopolymer C and the monomer A (or B) in the copolymer AB is mediated by the nearest neighbors chemically bonded to the A (or B) structural unit. It is found that the sequence distribution may significantly affect the degree of compatibility between the polymers AB and C. For a fixed composition, there is an optimal range of values (or sequence distributions) for which the C/AB system is miscible.