Poly(isobutylene) nanoparticles via cationic polymerization in nonaqueous emulsions.
Poly(isobutylene) nanoparticles via cationic polymerization in nonaqueous emulsions.
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DOI：
10.1002/marc.201400401
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发表时间：
2015
影响因子：
4.6
通讯作者：
T. Schuster;F. Golling;Joseph W Krumpfer;M. Wagner;R. Graf;A. Alsaygh;M. Klapper;K. Müllen
中科院分区：
文献类型：
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作者：
T. Schuster;F. Golling;Joseph W Krumpfer;M. Wagner;R. Graf;A. Alsaygh;M. Klapper;K. Müllen
采用阳离子乳液聚合法制备了聚异丁烯纳米粒子。根据要求，开发了一种全氟烷烃包油非水乳液，该乳液在碳阳离子聚合条件下呈惰性。为了稳定氟化连续相中的二氯甲烷/己烷液滴，制备含有PIB和1H，1H-全氟烷基化聚（五氟苯乙烯）嵌段的两亲性嵌段共聚物乳化剂。该体系允许数均分子量（Mn）高达27，000 g mol（-1）的异丁烯聚合。通过动态光散射和电子显微镜的颗粒形态进行表征。当Mn > 20，000 g mol（-1）时，颗粒在室温下具有形状持久性，直径约为100 nm。
The preparation of poly(isobutylene) (PIB) nanoparticles via cationic emulsion polymerization is presented. As a requirement, an oil-in-perfluoroalkane nonaqueous emulsion is developed, which is inert under the carbocationic polymerization conditions. To stabilize the dichloromethane/hexane droplets in the fluorinated, continuous phase, an amphiphilic block copolymer emulsifier is prepared containing PIB and 1H,1H-perfluoroalkylated poly(pentafluorostyrene) blocks. This system allows for the polymerization of isobutylene with number-average molecular weights (Mn) up to 27,000 g mol(-1). The particle morphologies are characterized via dynamic light scattering and electron microscopy. For Mn > 20,000 g mol(-1), the particles exhibit shape-persistence at room temperature and are ≈100 nm in diameter.