STEREOCOMPLEX FORMATION IN POLYBUTADIENE-SYNDIOTACTIC POLY(METHYL METHACRYLATE) BLOCK-COPOLYMERS BLENDED WITH ISOTACTIC POLY(METHYL METHACRYLATE) .2. INFLUENCE OF MOLAR MASSES

被引：3
|
作者：
BERKOUKCHI, MP
HELARY, G
BELORGEY, G
HOGENESCH, TE
机构：
[1] UNIV PARIS 13,RECH MACROMOLEC LAB,CNRS UNITE,F-93430 VILLETANEUSE,FRANCE
[2] UNIV SO CALIF,LOKER HYDROCARBON RES INST,LOS ANGELES,CA 90089
[3] UNIV SO CALIF,DEPT CHEM,LOS ANGELES,CA 90089
来源：
POLYMER BULLETIN | 1994年 / 32卷 / 03期
关键词：
D O I：
10.1007/BF00308540
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The process of stereocomplexation in blends of isotactic poly(methyl methacrylate)s and polybutadiene-syndiotactic poly(methyl methacrylate) diblock copolymers was studied by differential scanning calorimetry as a function of molar mass of the constituents, annealing time and temperature. The amount of complex formed is dependent on these three parameters, while the temperature of decomposition of the complex is only dependent on the annealing temperature. Complex formation can be observed in blends containing a copolymer with a very low molar mass syndiotactic poly(methyl methacrylate) block (Mn=700). In contrast to homopolymer blends, for which two endotherms of decomposition were generally reported, only one endotherm is observed for copolymer-homopolymer blends. This behavior is attributed to the elastomer block.
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页码：297 / 303
页数：7
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