Study of the cationic photopolymerization kinetics of cyclic acetals
Study of the cationic photopolymerization kinetics of cyclic acetals
复制标题
环状缩醛的阳离子光聚合动力学研究
DOI：
10.1007/s002890200012
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发表时间：
2002
期刊：
影响因子：
3.2
通讯作者：
M. Abadie
中科院分区：
文献类型：
--
作者：
M. Pantiru;D. Vuluga;D. Vasilescu;M. Abadie
研究了三种环缩醛分别为1,3-二恶烷、1,3-二恶烷和1,3,6-三恶烷的光阳离子聚合反应。已经使用了几种阳离子光引发剂（二芳基碘鎓或三芳基磺酸盐和一种芳烃-金属配合物）。差示扫描光量热法（DPC）记录了其随时间的依赖转换。而DPC热图则被用来计算传播反应常数以及相应的活化能。以二芳基磺鎓盐为光引发剂，1,3-二氧六烷在30℃时的传播常数为1.6·102L/mol·s，以三芳基磺鎓盐为光引发剂，1,3-二氧六烷的传播常数为1.6·103L/mol·s, 1,3,6-三氧六烷的传播常数为6.1·103L/mol·s。活化能在9.6÷19.6千卡/摩尔范围内。
Photocationic polymerization for three cyclic acetals, namely 1,3-dioxolane, 1,3-dioxepane and 1,3,6-trioxocane, respectively, has been studied. Several cationic photo-initiators (diaryliodonium or triarylsulfonium salts, and one arene-metal complex) have been used. Differential scanning photo-calorimetry (DPC) has been employed to record the dependence conversion versus time. DPC thermogrames, in turn, have been utilized to calculate the propagation reaction constants as well as the corresponding activation energies. The values for the propagation constants at 30°C are 1.6·102L/mol·s for 1,3-dioxolane, using a diaryliodonium salt as photoinitiator, 1.6·103L/mol·s for 1,3-dioxepane and 6.1·103L/mol·s for 1,3,6-trioxocane, respectively, in the presence of a triarylsulfonium salt as photoinitiator. The activation energies are in the range of 9.6÷19.6 kcal/mole.