Design of Graft Copolymer by Using Monomer-Initiator

使用单体引发剂设计接枝共聚物

基本信息

  • 批准号:
    61550682
  • 负责人:
  • 金额:
    $ 1.09万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1986
  • 资助国家:
    日本
  • 起止时间:
    1986 至 1987
  • 项目状态:
    已结题

项目摘要

For prepatation of block or graft copolymers consisting of varieties of polymer chains by radical polymerization, one of the most promising procedures is polymerization with a polymer-initiator. In this study, monomer-initiators, 2-methacryloyloxyethyl 4,4'-azobis-4-cyanopentanoate (HEMA-azo), p-isopropenyl 4,4'-azobis-4-cyanopentanoate (<alph>-MeSt-azo), 1,1'-azobis-1-methacryloyloxyphenyl-ethane, 2,2'-azobis(methacryloyloxymethyl)propionitrile, and 2,2'-azobis-2-methyl-N-(2-methacryloyloxyethyl)propionamide were synthesized as to prepare the polymer-initaitor by copolymerization with styrene or methyl methacrylate. The content of the initiator unit in the polymer was mainly 0.5-5 mol-%. Initiation rate of the polymer-initiator being determined by scavenging with 1,3,5-triphenylveradzyl seemed to be not greater than that of the corresponding low molecular weight initiator, owing to a lower efficiency.Although decomposition of the polymer-initiator results in a macroradical and a lower molecular weight fragment leading to unavoidable formation of the homopolymer corresponding to the branch, all the polymer-initiators afforded the mixtures involving 50-70 wt-% of the graft copolymers. HEMA-azo and <alph>-MeSt-azo which were prepared by the reactions of 2-hydroxyethyl methacrylate and p-hydroxy-<alph>-methylstyrene with the azo chloride, respectively, were noted as useful monomer-initiators yielding the polymer-initiator with appropriate decomposition rates. However, the polymer-initiator containing <alph>-MeSt-azo unit is preferable to that containing HEMA-azo unit, because the latter tends to form cross-linked product.These findings suggest that almost any combination of polymer chains is obtainable by this technique. Structual control of the resulting graft copolymer, chain length of the back bone polymer, nunbmer of the branch, and chain length of the branch, were attained on the basis of standard kinetics of radical polymerization.
通过自由基聚合法制备由多种高分子链组成的嵌段或接枝共聚物,最有前途的方法之一是用聚合物引发剂进行聚合。本文合成了单体引发剂4,4‘-偶氮二氰戊酸酯(HEMA-azo)、4,4’-偶氮氰戊酸异丙酯(&lt;alph&gt;-Mest-azo)、1,1‘-偶氮-1-甲基丙烯酰氧基苯乙烷(2,2’-azobis(methacryloyloxymethyl)propionitrile,)和甲基丙烯酰氧基苯基乙烷(2,2‘-azobis-2-methyl-N-(2-methacryloyloxyethyl)propionamide),并与苯乙烯或甲基丙烯酸甲酯共聚制备了聚合物引发剂。聚合物中引发剂单元的含量主要为0.5-5摩尔-%。通过清除1,3,5-三苯基的方法确定的聚合物引发剂的引发率似乎不比相应的低分子质量引发剂的引发剂大,虽然聚合物引发剂的分解导致大分子碎片和低分子量碎片,导致不可避免地形成与支链相对应的均聚物,但所有聚合物引发剂都提供了50-70wt-%的接枝共聚物的混合物。由甲基丙烯酸羟乙酯和对羟基-α-甲基苯乙烯分别与偶氮氯反应得到的HEMA-偶氮和-甲基-偶氮是有用的单体引发剂,具有合适的分解速率。然而,含有-Alph&>-Mest-azo单元的聚合物引发剂比含有HEMA-azo单元的聚合物引发剂更可取,因为后者倾向于形成交联产物。这些发现表明,通过这种技术几乎可以获得任何聚合物链的组合。在自由基聚合标准动力学的基础上,实现了接枝共聚物的结构控制、支链链长、支链链长和支链链长。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Bunichiro YAMADA, Takayuki OTSU: "Monomer-Initiators Bearing Methacrylic Ester or <alpha>-Methylstyrene Moiety for Design of Graft Copolymer" Chemistry Express in Preparation. 3. (1988)
Bunichiro YAMADA、Takayuki OTSU:“用于设计接枝共聚物的带有甲基丙烯酸酯或 α-甲基苯乙烯部分的单体引发剂”Chemistry Express 准备中。
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YAMADA Bunichiro其他文献

YAMADA Bunichiro的其他文献

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{{ truncateString('YAMADA Bunichiro', 18)}}的其他基金

Control of Branching in Radical Polymerization Based on New Concept
基于新理念的自由基聚合支化控制
  • 批准号:
    10650869
  • 财政年份:
    1998
  • 资助金额:
    $ 1.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Preparation Dendrimer Like Polymer by Radical Polymerization
自由基聚合制备树枝状聚合物
  • 批准号:
    08651057
  • 财政年份:
    1996
  • 资助金额:
    $ 1.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Polymerization of New Type of Fluorine Containing Acrylic Monomer and Characterization of the Polymer
新型含氟丙烯酸单体的聚合及聚合物的表征
  • 批准号:
    01550719
  • 财政年份:
    1989
  • 资助金额:
    $ 1.09万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
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