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ID:34831079
大小:4.31 MB
页数:79页
时间:2019-03-12
《基于丙烯酰胺双水相聚合》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、,娜声次掌学风峨尤认位孔或妒论文硕士论文题目一作者姓名一一直鱼鱼一一一一一指导教师崖坚噬二邀投‘一—学科专业一一韭生土址一一所在学院一址也全鱼一提交日期一一型些宜生月宫匆厂,一,,浙江大学硕士学位论文摘要聚丙烯酞胺被广泛地应用于水处理、造纸、石油、煤炭、矿业、地质和建筑行业,一是最重要的水溶性聚合物之一。聚合物双水相体系概念在上世纪年代被提出,,。后己被广泛应用于生物蛋白质和细胞分离领域技术己相当成熟但是将水溶性聚合物的制备与双水相体系两者结合的研究还鲜有报道。本论文以此为出发点,提出利用双水相聚合反应制备水溶性聚合物的新方法。双水相聚合反应是将一种水溶性单体、引发剂及分散介质另一种水溶性聚
2、合物溶解在水中,形成均相水溶液,一定条件下进行聚合反应,由于聚合物之间的相互作用,体系发生相分离,两种聚合物分别富集在各自相中,形成互不相容的水溶性聚合物分散。、,液的聚合反应它克服普通水溶液聚合高粘搅拌和传热困难等缺陷且聚合和使用过程中不存在有机溶剂污染,后处理简单,是制备水溶性聚合物的新方法。本论文首先从水溶性聚合物的疏水性差异、聚合物水溶液粘度及聚合体系稳定性角度出发选择聚。运乙二醇水溶液作为丙烯酞胺双水相聚合的分散介质用红外光谱及研究了和之间的相互作用。分别用及浊度滴定法绘制了队一一水双水相体系的相图,考察了分子量及平衡温度对相图的影响。结合澳化滴定法测定了在两相中的分配系数,考察了
3、和浓度及平衡温度对分配系数的影响。双水相聚合体系中水溶液为连续相,队溶液为分散相,通过对液滴形水态及滴径分布的研究,提出液滴形成及稳定机理。认为有以下三方面原因促使液滴能稳定地分散在连续相中液滴内部的高粘度、连续相的粘度及引发剂碎片的静电作用。通过测定聚合过程中单体在两相中的分配系数,认为双水相聚合为一个在两相中同时聚合的反应。本文分别研究了单一引发体系过硫酸馁复合引发体系三乙醇胺和四甲基。,乙二胺的聚合动力学单一引发体系中考察了聚合温度、浓度、单体浓度、浓度、分散介质种类及乳化剂种类对聚合速率及转化率的影响,同时研究了聚合温度、单体和浓度对分子量的影响研究复合引发体系时,考察了聚合温度、及
4、浓度对聚合速率和分子量的影响。双水相聚合过程中,体系能始终保持相对的低粘度。粘度也是本反应体系稳定性及另摘要优越性最为直观的体现,在论文的最后、单一章研究了聚合过程中粘度变化及分散介质体、引发剂和乳化剂浓度、聚合温度及外界温度对聚合最终产品粘度的影响。,丙烯酞胺,聚,,,,,关键词双水相聚合乙二醇相图动力学分子量稳定性粘度厂入浙江人学硕卜学位论文,,,一一,一,一,一一一,,,而一一,一一’·一一,一一一,、石,,。,一几。。。。,。。。,‘。,。感一,,,,,,娜,一,’娜,,,,一,,,,,,,矛浙江大学硕十学位论文目录摘要································
5、·······················································……目录····················································································……前言·····························································································……文献综述·····················································
6、·····································……聚合物双水相体系········································································……聚合物双水相体系分相机·······························,················,···,·……理聚合物双水相体系相图····························································……聚合物双水相体系研究近况··························
7、················……,影响聚合物双水相体系相图的因素·································……双水相聚合体系相图及微观结构····································……双水相体系的相····························································……互作用丙烯酞胺聚合动力学····
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