高分子量高纯度阳离子聚丙烯酰胺(CPAM)的合成

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1、高分子量高纯度阳离子聚丙烯酰胺的合成摘要以丙烯酰胺与丙烯酰氧乙基三甲基氯化铵为单体，在复合引发剂的作用下，选择水溶液共聚法合成高分子量与高纯度阳离子型聚丙烯酰胺(CPAM)。实验表明，有机偶氮引发剂A用量0．5‰、氧化还原引发剂用量0．45‰、还原剂与氧化剂摩尔比2∶1、反应体系pH为4与反应时间5h条件下，CPAM分子量为1042万，且溶解性好。通过对聚合物残单含量影响因素添加剂用量、反应时间的研究，结果表明，添加剂EDTA和增溶剂D对残留AM含量影响小，而苯甲酸钠对聚合物残留AM的含量影响显著;延长反应时间至7h，残单含量可降低至0.27%，CPAM的纯度高。通过与国

2、内外3种同类型产品进行对比，结果表明，自制产品的分子量明显高于其他产品，且残单含量比国内产品降低了50%～75%。关键词聚丙烯酰胺阳离子高纯度高分子量残单量中图分类号X703.1文献标识码A文章编号1673-9108(2012)04-1075-06Synthesisofacationicpolyacrylamidewithhighmolecularweightandhighpuritywww.xy-pam.comZhengHuaili1YouYanfei1DengXiaoli1ZhengMeizhen1ZhuGuocheng1XiangXinyi1，2JiangShaoj

3、ie1(1．KeyLaboratoryoftheThreeGorgesReservoirRegion’sEco-Environment，MinistryofEducation，ChongqingUniversity，Chongqing400045，China;2．SchoolofGeographicalSciences，SouthwestUniversity，Chongqing400715，China)AbstractInthisresearch，acationicpolyacrylamide(CPAM)withhighmolecularweightandhighpuri

4、tywassynthesizedthoughaqueouscopolymerizationofacrylamidewithacryloyloxyethyltrimethylammoniumchlo-ride，andthecompositeinitiatorswereusedtoacceleratethepolymerization．TheexperimentalresultsshowedthatthemolecularweightofCPAMwithahighsolubilityintherangeof10.42millionwasachievedwhenazoin-it

5、iator(A)dosagewas0.5‰，redoxinitiatordosagewas0.45‰，thereducer/oxidizermolarratiowas2∶1，re-actiontimewas5h，andpHwas4．Inaddition，someparametersaffectingresidualmonomerconcentrationsuchasadditiveconcentrationandreactiontimewereexamined．Theresultsindicatedthatadditives(EDTAandsolu-bilizerD)ha

6、dnosignificantinfluenceontheconcentrationoftheresidualAMmonomerbutsodiumbenzoateex-hibitedaremarkableeffectontheAMconcentration．Consequently，whenprolongingthereactiontimeto7hours，theresidualmonomerconcentrationwouldbereducedto0.27%，andahighpurityCPAMwasobtained．Bycomparedwiththreesametype

7、productsmadeathomeandabroad，itshowedthatthemolecularweightofCPAMwassignificantlyhigherthanotherproducts，andtheresidualcontentofAMwaslowerthandomesticproducts，withasinglereductionof50%～75%．Keywordspolyacrylamide;cation;highpurity;highmolecularweight;levelofresidueofm