羧甲基瓜尔胶与DMC-AM二元单体的接枝共聚合

华南理工大学学报（自然科学版） ›› 2008, Vol. 36 ›› Issue (3): 69-72,94.

羧甲基瓜尔胶与DMC-AM二元单体的接枝共聚合

万小芳¹ 汪晓军²

1. 华南理工大学资源科学与造纸工程学院, 广东广州 510640； 2. 华南理工大学环境科学与工程学院, 广东广州 510640

收稿日期:2007-05-23 修回日期:2007-06-24 出版日期:2008-03-25 发布日期:2008-03-25
通信作者: 万小芳（1970-），女，讲师，主要从事造纸化学品的研究． E-mail:kelain@126．com
作者简介:万小芳（1970-），女，讲师，主要从事造纸化学品的研究．

Grafting Copolymerization of Carboxymethyl Guar Gum and DMC-AM Co-Monomers

Wan Xiao-fang¹ Wang Xiao-jun²

1.School of Resources Science and Papermaking Engineering, South China University of Technology, Gnangzhou 510640, Guangdong, China; 2. School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China

Received:2007-05-23 Revised:2007-06-24 Online:2008-03-25 Published:2008-03-25
Contact: 万小芳（1970-），女，讲师，主要从事造纸化学品的研究． E-mail:kelain@126．com
About author:万小芳（1970-），女，讲师，主要从事造纸化学品的研究．

摘要/Abstract

摘要： 以高锰酸钾／硫酸引发羧甲基瓜尔胶（CMGG）和丙烯酰胺（AM）、甲基丙烯酰氧乙基三甲基氯化铵（DMC）的接枝共聚合反应制备两性瓜尔胶（AC-GG），考察了引发剂、单体和CMGG浓度及取代度等因素对接枝共聚反应的影响，得到最佳操作条件下的转化率、接枝率和接枝效率分别为92．9％，797％和84．7％．根据Arrhenius方程计算得到296～323K下共聚反应的表观活化能为13．28kJ／mol，表明高锰酸钾是高效引发剂．¹³C-NMR证实发生了接枝反应．

关键词: 羧甲基瓜尔胶, 高锰酸钾, 接枝共聚合

Abstract:

The co-monomers of ethyl methylacrylate-trimethylammonium chloride （ DMC ） and acrylamide （AM） were grafted onto carboxymethyl guar gum （CMGG） to synthesize amphoteric guar gum （AC-GG）, with potassium permanganate/sulfuric acid as the initiator. The effects of the concentrations of the initiator, the monomer and CMGG as well as the degree of substitution （DS） of CMGG on the grafting copolymerization were then investigated. The results show that, in the optimal conditions, the polymerization conversion ratio, the grafting ratio and the grafting efficiency are respectively 92.9%, 797%and 84.7%. Moreover, it is found that potassium permanganate is a high-efficiency initiator because the apparent activation energy calculated by Arrhenius equation is up to 13.28 kJ/mol. The grafting is further characterized by means of ¹³C-NMR.

Key words: carboxymethyl guar gum, potassium permanganate, grafting copolymerization

万小芳汪晓军 . 羧甲基瓜尔胶与DMC-AM二元单体的接枝共聚合[J]. 华南理工大学学报（自然科学版）, 2008, 36(3): 69-72,94.

Wan Xiao-fang Wang Xiao-jun. Grafting Copolymerization of Carboxymethyl Guar Gum and DMC-AM Co-Monomers[J]. Journal of South China University of Technology (Natural Science Edition), 2008, 36(3): 69-72,94.