• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Final program and proceedings of ISamp;T's 50th annual conference >Monitoring the kinetics of UV curing using in situ rheology and real-time fourier transform infrared spectroscopy
【24h】

Monitoring the kinetics of UV curing using in situ rheology and real-time fourier transform infrared spectroscopy

机译：使用原位流变学和实时傅立叶变换红外光谱法监测UV固化的动力学

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

An in situ dynamic rheology technique and real-time Fourier transform infrared (FTIR) spectroscopy were used to characterize the UV cross-liniing of a thiol-ene system consisting of trimethylolpropane tris(2-mercaptoacetate) and trimethylolpropane diallyl ether. In order to compare the changes in rheological properties and chemistry of the thiolene system during UV curing, the evolving elastic modulus was correlated with the thiol coversion. The thiol conversion increased the fastest during the initial stages of the reaction while the elastic mdulus did not have an appreciable value until the thiol conversion reached 0.65. From the Flory-Stockmayer theory of gelation, the critical thiol conversion at the gel point was determined to be 0.71, suggesting that the elastic modulus did not have an appreciable value until the sample is near its gel point. This indicated that large enough cross-linked clusters, with relaxation times comparable to the time scales of the imposed deformation, have to be formed in order for the elastic modulus to have an appreciable value.
机译：原位动态流变技术和实时傅立叶变换红外（FTIR）光谱用于表征由三羟甲基丙烷三（2-巯基乙酸）和三羟甲基丙烷二烯丙基醚组成的硫醇-烯系统的紫外交联。为了比较紫外固化过程中硫烯体系的流变性质和化学变化，将演化的弹性模量与硫醇覆盖率相关联。在反应的初始阶段，硫醇转化率增长最快，而弹性膜密度直到硫醇转化率达到0.65时才具有可观的价值。根据Flory-Stockmayer凝胶化理论，在凝胶点的临界硫醇转化率确定为0.71，这表明弹性模量直到样品接近其凝胶点才具有可观的值。这表明必须形成足够大的交联簇，其松弛时间可与所施加的变形的时间尺度相媲美，以使弹性模量具有可观的值。

著录项

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