Toughened polystyrene containing block, graded block and randomized copolymers of butadiene-styrene
Toughened polystyrene containing block, graded block and randomized copolymers of butadiene-styrene
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DOI：
10.1016/0032-3861(87)90412-5
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发表时间：
1987-02
期刊：
影响因子：
4.6
通讯作者：
K. Sardelis;H. J. Michels;G. Allen
中科院分区：
文献类型：
--
作者：
K. Sardelis;H. J. Michels;G. Allen
在丁二烯-苯乙烯的嵌段、分级嵌段或无规共聚物存在下的苯乙烯聚合过程中，观察到分散的橡胶颗粒的新形态（即圆柱型、核壳、层状）。这些形态是（i）共聚物和“原位”形成的聚苯乙烯之间的聚合物-聚合物相互作用，（ii）共聚物的聚丁二烯和聚苯乙烯序列内的分子内相分离，和（iii）聚合过程中的机械处理的结果。这些形态的结构特征的阐明已通过以下的聚合过程中的相变和相对于它们的组合物的变化的共聚物的分子内相分离的变化。无规共聚物能够形成增韧的聚苯乙烯共混物与那些含有聚丁二烯橡胶的形态相似，但具有增强的橡胶和聚苯乙烯基体之间的粘合力。这种无规共聚物的结构特征已经建立。
During the polymerization of styrene in the presence of a block, graded block, or randomized copolymer of butadiene-styrene, new morphologies of dispersed rubber particles are observed (i.e. cylindrical-type, coreshell, lamellar). These morphologies are the result of (i) polymer-polymer interactions between the copolymer and the ‘in situ’ formed polystyrene, (ii) an intramolecular phase separation within the polybutadiene and polystyrene sequences of the copolymer, and (iii) the mechanical treatment during the polymerization process. Elucidation of the structural characteristics of these morphologies has been achieved by following the phase changes during the polymerization and the changes in the intramolecular phase separation of the copolymers with respect to variation of their composition. The randomized copolymers were capable of forming toughened polystyrene blends with similar morphology to those containing polybutadiene rubber, but with enhanced adhesion between the rubber and polystyrene matrix. The structural characteristics of such randomized copolymers have been established.