• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymer Degradation and Stability >How to reveal latent degradation of coatings provoked by UV-light
【24h】

How to reveal latent degradation of coatings provoked by UV-light

机译：如何揭示紫外线引起的涂料潜在降解

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper deals with predictions of the service life of the two main technologies used for automotive clearcoats: acrylic-melamine and acrylic-urethane. This work demonstrates that the UV-light irradiation leads to chain scissions and crosslinking for the unstabilised and stabilised formulations. Mechanisms are proposed to explain the dramatic increase in the values of the mechanical properties for the two technologies as a function of the ageing time. For a determined critical value of the mechanical properties, water acts to reveal the latent damage by leading to the formation of cracks. Moreover, when the polymer reaches a certain level of network densification due to UV-light irradiation, the system cannot accept the stress induced by the water inflation/deflation and cracks will occur. Other solvents were also tested to understand the effects of polarity on the formation of the cracks.
机译：本文探讨了用于汽车清漆的两种主要技术的使用寿命：丙烯酸-三聚氰胺和丙烯酸-氨基甲酸酯。这项工作表明，紫外线辐射导致不稳定和稳定制剂的链断裂和交联。提出了一种机制来解释这两种技术的机械性能值随老化时间的急剧增加。对于确定的机械性能临界值，水通过导致裂纹的形成来揭示潜在的损坏。而且，当聚合物由于紫外线照射而达到一定程度的网络致密化时，系统不能接受由水膨胀/放气引起的应力，并且会发生裂纹。还测试了其他溶剂，以了解极性对裂纹形成的影响。

著录项

  • 来源
    《Polymer Degradation and Stability》 |2010年第9期|p.1810-1817|共8页
  • 作者

    J.-F. Larche; rnP.-O. Bussiere; rnJ.-L. Gardette;

  • 作者单位

    Clermont Universite, Universite Blaise Pascal, Laboratoire de Photochimie Moleculaire et Macmmoleculaire, BP 10448, F-63000 Clermont-Ferrand, France CNRS, UMR 6505, LPMM, F-63173 Aubiere, France PSA-Peugeot-Citroen, Direction Technique et Industrielle, Route de Gisy, 78140 Velizy Villacoublay, France;

    rnClermont Universite, Ecole Nationale Superieure de Chimie, Laboratoire de Photochimie Moleculaire et Macmmoleculaire, BP 10448, F-63000 Clermont-Ferrand, France CNRS, UMR 6505, LPMM, F-63173 Aubiere, France;

    rnClermont Universite, Universite Blaise Pascal, Laboratoire de Photochimie Moleculaire et Macmmoleculaire, BP 10448, F-63000 Clermont-Ferrand, France CNRS, UMR 6505, LPMM, F-63173 Aubiere, France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photo-ageing; water; clearcoat; cracking; acrylic; urethane; melamine;

    机译：光老化水;清漆;破裂亚克力氨基甲酸酯三聚氰胺;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号