在超声波辐照作用下聚乙烯醇的降解及与丙烯腈共聚反应的研究

CIESC Journal

在超声波辐照作用下聚乙烯醇的降解及与丙烯腈共聚反应的研究

沈埜,陈克强,王琪,李惠林,徐僖

成都科技大学高分子研究所,成都科技大学高分子研究所,成都科技大学高分子研究所,成都科技大学高分子研究所,成都科技大学高分子研究所成都 ,成都 ,成都 ,成都 ,成都

出版日期:1988-08-25 发布日期:1988-08-25

Ultrasonic Degradation of Polyvinyl Alcohol and Copolymerization of PVA with Acrylonitrile

Shen Ye, Chen Keqiang, Wang Qi, Li Huilin and Xu Xi (Polymer Research Institute, Chengdu University of Science and Technology, Chengdu)

Online:1988-08-25 Published:1988-08-25

摘要/Abstract

摘要： 本文研究了超声波辐照下聚乙烯醇(PVA)在水溶液中的降解规律,结果表明PVA在水溶液中的超声降解速率遵循Baramboim动力学方程.本文还研究了丙烯腈(AN)与PVA在水溶液中的超声波辐照共聚反应.改变超声辐照时间或溶液中AN的量,可得到水溶性和水不溶性两类共聚物.用IR、MS、PGC和X-射线衍射研究了共聚物的结构,证明所得产物主要为嵌段共聚物.在2%的PVA/AN(1/1.6,质量比)水溶液中,以频率为21.5kHz、声强为490W的超声波在20±1℃下辐照28min,水溶性共聚物产率[共聚物产率=(共聚物重/PVA加入量)×100%〕为25.49%,共聚物中AN含量为13.98%;在相同条件下,对2%的PVA/AN(1/4,质量比)水溶液,辐照100min,水不溶性共聚物产率为296.01%,共聚物中AN含量为75.56%.

Abstract: The ultrasonic degradation of polyvinyl alcohol (PVA) in aqueous solution and the copolymerization of PVA with acrylonitrile (AN) were studied. It was confirmed that the rate of degradation of PVA followed the kinetic equation suggested by N. K. Baramboim. Both water-soluble and water-insoluble copoly-mers could be obtained by changing the irradiation time or the amount of AN added to the aqueous solution of PVA. The structure of the copolymer was identified by IR, MS, PGC and X-ray diffraction. The copolymer prepared was mainly a blocked one. By irradiating 2% PVA/AN (1/1.6, by mass) at 20±1℃ and 21.5 kHz with 490W for a period of 28 min., the yield of the water-soluble copolymer was 25.49%, with a AN content of 13.98%. When the irradiating period was extended to 100 min., with the mass ratio between PVA and AN at 1/4, the yield of the water-insoluble copolymer amounted to 296.01%, with a AN content 75.56%.

沈埜,陈克强,王琪,李惠林,徐僖. 在超声波辐照作用下聚乙烯醇的降解及与丙烯腈共聚反应的研究 [J]. CIESC Journal.

Shen Ye, Chen Keqiang, Wang Qi, Li Huilin and Xu Xi (Polymer Research Institute, Chengdu University of Science and Technology, Chengdu). Ultrasonic Degradation of Polyvinyl Alcohol and Copolymerization of PVA with Acrylonitrile[J]. .