首页 | 本学科首页   官方微博 | 高级检索  
     


Mean‐Field Calculation of MZ for Randomly Branched Condensation Polymers
Authors:Roy Odle  Joseph D. Mitchell  John T. Bendler
Abstract:The mean‐field theory of Flory–Stockmayer for randomly branched polymers in the regime of strong chain overlap is extended to a calculation of MZ via the recursive method of Miller and Macosko. The formalism includes condensation polymers, copolymers, chain stoppers, bifunctional diluents to control the chain length between branch points, multiple branching agents, and arbitrary stoichiometries. MZ closely approximates the largest branched polymer in the system and is therefore a key parameter describing static scaling behavior near the gel point. Nonuniversal static scaling of MZ is illustrated with examples from the literature. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019 , 57, 1415–1422
Keywords:characteristic molecular weight  crosslinking  gelation  GPC  mean‐field theory  MZ  percolation  SEC  sol–  gel transition  static critical scaling  Z‐average molecular weight
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号