pH值对超声辐照下聚乙烯醇-丙烯腈体系共聚反应影响的研究  

Effect of pH Value on Ultrasonic Copolymerization of Polyvinyl Alcohol with Acrylonitrile

作　　者：刘启溶 陈克强[1] 许开天 徐僖[1] 

机构地区：[1]成都科技大学高分子研究所

出　　处：《化工学报》1990年第2期249-252,共4页CIESC Journal

基　　金：国家自然科学基金

摘　　要：聚乙烯醇(PVA)是制造维纶纤维的原料.维纶是棉型纤维,具有高强、耐磨和高吸湿性特点,但是染色性差,回弹性低.腈纶具有高回弹性和优良染色性,素有合成羊毛之称,但是强度较低,吸湿性差.通过嵌段共聚可使腈纶和腈纶在分子基础上结合,制得兼具维纶和腈纶优异性能的新型合成纤维.有关在超声辐照下PVA与丙烯腈(AN)的嵌段共聚反应已有报道,为进一步提高共聚反应速率、共聚物产率及共聚物中AN含量,本文对体系PH值的影响进行了研究.The effect of pH value on the ultrasonic copolymerization of polyvinyl alcohol (PVA) in its aqueous solution with acrylonitrile (AN) was studied. It was found that the reaction might be controlled merely by varying the pH value of the system. The resulted irradiation mixture was a stable water based dispersion. The particle size of the copolymer formed increased with the decrease of pH value. With the decrease of pH value, both the yield of copolymer and AN content in the copolymer would be increased. No homopolymer of AN was found in the reaction products.

关 键 词：PH值 聚乙烯醇 丙烯腈 共聚 

分 类 号：O632.31[理学—高分子化学]