沉淀聚合合成高分子量苯乙烯—马来酸酐共聚物及马来酸酐共聚物微球
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摘要
用沉淀聚合合成了高分子量苯乙烯-马来酸酐共聚物。研究了反应温度、单体浓度及其配比、反应时间、引发剂的浓度、搅拌、反应介质对共聚物分子量的影响。共聚物的数均分子量可到达159万。研究了反应介质和单体浓度对共聚物微球形貌及粒径的影响,并分析了不同形貌微球的形成机理。
利用沉淀聚合分别合成了马来酸酐-丁二烯共聚物微球和马来酸酐-异戊二烯共聚物微球。研究了搅拌、单体配比、反应时间、反应介质对马来酸酐-丁二烯共聚物微球形貌及其粒径的影响。研究了搅拌、单体浓度、引发剂种类、反应温度、反应介质对马来酸酐-异戊二烯共聚物微球形貌及其粒径的影响。实验结果显示合成的马来酸酐-丁二烯共聚物微球和马来酸酐-异戊二烯共聚物微球为交联微球,利用马来酸酐-异戊二烯共聚物微球制备了具有核-壳结构的微球和空心微球。
通过沉淀聚合合成了交联马来酸酐-醋酸乙烯酯共聚物微球,并研究了引发剂种类、单体浓度及其配比、交联剂的浓度对共聚物微球的形貌及其粒径的影响。实验结果显示合成的共聚物的微观形貌为圆形粒子、椭圆形粒子和心形粒子,通过研究不同反应时间对共聚物形貌的影响,探讨了不同共聚物形貌形成的机理。
High molecular weight poly (styrene-co-maleic anhydride) was synthesized by precipitation polymerization. Influences of reaction temperature, monomer concentration, monomer ratio, reaction time, initiator concentration, stir and reaction medium on molecular weight of copolymers were investigated. The copolymers with Mn of 1.59×106 could be synthesized. Influences of reaction medium and monomer concentration on morphology and diameter of copolymers were studied, and the mechanism of different morphology of copolymers was also investigated.
Poly (maleic anhydride-co-butadiene) microspheres and poly (maleic anhydride-co-isoprene) microspheres were synthesized by precipitation polymerization. Influences of stir, monomer ratio, reaction time and reaction medium on morphology and diameter of poly (maleic anhydride-co-butadiene) microspheres were studied, and influences of stir, monomer concentration, category of initiators, reaction temperature and reaction medium on morphology and diameter of poly (maleic anhydride-co-isoprene) microspheres were also investigated. It's demonstrated that poly (maleic anhydride-co-butadiene) microspheres and poly (maleic anhydride-co-isoprene) microspheres we synthesized were cross-linked, thanks to which core-shell microspheres and hollow microspheres were prepared with poly (maleic anhydride-co-isoprene) microspheres.
Microspheres of cross-linked poly (maleic anhydride-co-vinyl acetate) were synthesized by precipitation polymerization, and influences of category of initiators, monomer concentration, monomer ratio and the concentration of cross linker on morphology and diameter of copolymers microspheres were studied. It's shown that the morphology of copolymers could be sphere, potato-like and heart-like. Influences of different reaction time on morphology of copolymers were investigated, which demonstrates the mechanism of different morphology of copolymers.
利用沉淀聚合分别合成了马来酸酐-丁二烯共聚物微球和马来酸酐-异戊二烯共聚物微球。研究了搅拌、单体配比、反应时间、反应介质对马来酸酐-丁二烯共聚物微球形貌及其粒径的影响。研究了搅拌、单体浓度、引发剂种类、反应温度、反应介质对马来酸酐-异戊二烯共聚物微球形貌及其粒径的影响。实验结果显示合成的马来酸酐-丁二烯共聚物微球和马来酸酐-异戊二烯共聚物微球为交联微球,利用马来酸酐-异戊二烯共聚物微球制备了具有核-壳结构的微球和空心微球。
通过沉淀聚合合成了交联马来酸酐-醋酸乙烯酯共聚物微球,并研究了引发剂种类、单体浓度及其配比、交联剂的浓度对共聚物微球的形貌及其粒径的影响。实验结果显示合成的共聚物的微观形貌为圆形粒子、椭圆形粒子和心形粒子,通过研究不同反应时间对共聚物形貌的影响,探讨了不同共聚物形貌形成的机理。
High molecular weight poly (styrene-co-maleic anhydride) was synthesized by precipitation polymerization. Influences of reaction temperature, monomer concentration, monomer ratio, reaction time, initiator concentration, stir and reaction medium on molecular weight of copolymers were investigated. The copolymers with Mn of 1.59×106 could be synthesized. Influences of reaction medium and monomer concentration on morphology and diameter of copolymers were studied, and the mechanism of different morphology of copolymers was also investigated.
Poly (maleic anhydride-co-butadiene) microspheres and poly (maleic anhydride-co-isoprene) microspheres were synthesized by precipitation polymerization. Influences of stir, monomer ratio, reaction time and reaction medium on morphology and diameter of poly (maleic anhydride-co-butadiene) microspheres were studied, and influences of stir, monomer concentration, category of initiators, reaction temperature and reaction medium on morphology and diameter of poly (maleic anhydride-co-isoprene) microspheres were also investigated. It's demonstrated that poly (maleic anhydride-co-butadiene) microspheres and poly (maleic anhydride-co-isoprene) microspheres we synthesized were cross-linked, thanks to which core-shell microspheres and hollow microspheres were prepared with poly (maleic anhydride-co-isoprene) microspheres.
Microspheres of cross-linked poly (maleic anhydride-co-vinyl acetate) were synthesized by precipitation polymerization, and influences of category of initiators, monomer concentration, monomer ratio and the concentration of cross linker on morphology and diameter of copolymers microspheres were studied. It's shown that the morphology of copolymers could be sphere, potato-like and heart-like. Influences of different reaction time on morphology of copolymers were investigated, which demonstrates the mechanism of different morphology of copolymers.
引文
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