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首页> 外文会议>Fluorine in coatings >The Effect of Monomer Sequence on the Polymer Durability in the Copolymers of Chlorotrifluoroethylene with Alkyl Vinyl Ester or Alkyl Vinyl Ethers
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The Effect of Monomer Sequence on the Polymer Durability in the Copolymers of Chlorotrifluoroethylene with Alkyl Vinyl Ester or Alkyl Vinyl Ethers

机译：单体序列对氯乙烯基酯或烷基乙烯基醚的氯丁二乙烯共聚物中的聚合物耐久性的影响

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摘要

The durability of fluoropolymer containing hydrocarbon vinyl monomer unit was assumed to be influenced by its polymer sequence. Monomer reactivity ratio (r_1, r_2 and r_1r_2) and Run Number R~* of CTFE/vinyl ether or vinyl ester were calculated with Fineman-Ross' method, and they indicated that the completeness of alternative copolymerization of CTFE/vinyl ether (CHVE) was greater than CTFE/vinyl ester. Sequence analysis in use of ~(13)C-NMR also showed that CTFE/CHVE copolymer consisted of almost complete alternative CVC sequence even if one monomer was rather excess to the other in monomer feed, while CTFE/VA copolymer consisted of not a few block sequence (CW, VW, CCC, CCV) except alternative sequence (CVC). The accelerated weathering test showed that the durability of PFEVE containing CHVE was greater than that of the other PFVES and the durability rank coincided with the rank of alternative copolymerization. Nevertheless the result of the accelerated weathering test, it is difficult to affirm that the superiority of alternative copolymerization influences the weatherability because many factors have effects on the weatherability except the polymer structure. Even if a same type polymer is used for the paint, the weatherability varies by the pigment dispersion, adhesiveness to the substrate or crosslinking level. However, we are confident that the weatherability of PFEVE is superior to that of PFEVES based on many experiences during over 15 years.
机译：含氟聚合物的耐烃乙烯基单体单元的耐久性被认为受其聚合物序列的影响。用Fineman-Ross的方法计算单体反应性比（R_1，R_2和R_1R_2）和CTFE /乙烯基醚或乙烯基酯的运行数R〜*，并表明CTFE /乙烯基醚（CHVE）的替代共聚的完整性大于CTFE /乙烯基酯。使用〜（13）C-NMR的序列分析还表明CTFE / CHVE共聚物包括几乎完整的替代CVC序列，即使一个单体在单体饲料中相当过量，而CTFE / VA共聚物则由不超过一些单体组成除替代序列（CVC）之外的块序列（CW，VW，CCC，CCV）。加速风化试验表明，含有CHVE的PFEVE的耐久性大于其他PFVVE的耐久性，并且耐久性等级与替代共聚等级一致。然而，加速风化试验的结果，难以确认替代共聚的优越性影响了耐候性，因为许多因素对除聚合物结构之外的耐候性具有影响。即使使用相同型聚合物用于涂料，耐候性也会通过颜料分散体，对基材的粘合性或交联水平变化。然而，我们相信Pfeve的耐候性基于超过15年的许多经验，优于Pfeves的耐候性。

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