分别采用水溶性丙烯酸(酯)共聚物和C_(60)/C_(70)改性丙烯酸(酯)共聚物作主要成膜物,以甲醚化三聚氰胺树脂作固化剂,考察了聚合物引入C_(60)/C_(70)后,其对聚合物中羟基和羧基与固化剂中甲氧基甲基反应活性的影响.通过对固化过程的DSC和交联度测试.结果说明,在聚合物中引入C_(60)/C_(70),由于其产生的空间位阻作用和电子分布效应,使聚合物中的羟基和羧基活性基团与固化剂中甲氧基甲基反应活性降低,从而导致共聚物的固化反应温度提高和固化速度的下降.
In this paper, water soluble copolymers of acrylic acid/acetate and water soluble copolymers of acrylic acid/acetate modified with C_(60)/C_(70) was used as main filming material respectively, and methylated melamine resin was used as curing agent.Then influence of the C_(60)/C_(70) on reactivity of hydroxyl and carboxyl groups of the copolymers, as well as methoxyl methyl groups of the curing agent was studied.By means of testing to the differential scanning calorimetry(DSC) and solidifing degree of the solidifing reaction, results indicate that steric hindrance effect and variation of electronic distribution arising from the C_(60)/C_(70) caused increase of curing temperatures of the copolymers.
参考文献
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| [2] | 刘晓国,官文超,李贤.纳米C60/C70-丙烯酸（酯） 共聚物的合成及性能[J].高分子材料科学与工程,2003(05):57-60. |
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