The Influence of Vitrification on the Formation of Densely Crosslinked Networks Using Photopolymerization
The Influence of Vitrification on the Formation of Densely Crosslinked Networks Using Photopolymerization
复制标题
玻璃化对光聚合形成致密交联网络的影响
DOI：
--
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
G. Lijten
中科院分区：
文献类型：
--
作者：
J. Kloosterboer;G. Lijten
二丙烯酸酯在接近环境温度下的光聚合可导致形成致密交联的玻璃状聚合物。等温玻璃化限制了反应基团的最终转化。这将影响产品的机械性能。玻璃化过程中的单体转化率不能用普通的化学动力学来描述，但它可以用Williams-Watts方程来拟合，类似于体积弛豫。对于二丙烯酸酯，甚至化学性质在玻璃化期间也会改变，因为直接终止逐渐被通过氢转移的终止所取代。
Photopolymerization of diacrylates near ambient temperature may result in the formation of densely crosslinked glassy polymers. Isothermal vitrification restricts the ultimate conversion of reactive groups. This will affect the mechanical properties of the product. The rate of monomer conversion during vitrification cannot be described with ordinary chemical kinetics but it can be fitted with a Williams-Watts equation, similar to volume relaxation. With diacrylates even the chemistry will change during vitrification, since direct termination is gradually replaced by termination through hydrogen transfer.