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时间:2020-03-26
《P(DEAM-co-NAS)的合成及其温敏性的环境效应.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~(WuliHuaxueXuebao)AugustActaPhys.一Chim.Sin.,2010,26(8):2189-21942189【Article]WWW.whxb.pku.edu.caP(DEAM-CO-NAS)的合成及其温敏性的环境效应张飒刘守信韩晓宇党莉齐晓君杨曦(应用表面与胶体化学教育部重点实验室,陕西师范大学化学与材料科学学院,西安710062)摘要:采用自由基溶液聚合法合成聚(N,N-:2基丙烯酰胺一CO—N-丙烯酸琥珀酰亚胺)(P(DEAM—CO—NAS))共聚比为7.9:l、3.5:1、2.5:1、2:1、1.5:1的五组共聚物.利用
2、傅里叶变换红9b(v'rm)光谱和核磁共振(HNMR)谱对P(DEAMCO—NAS)结构进行表征.共聚物组成和介质性质对P(DEAM—CO—NAS)水溶液温敏性有显著影响.结果表明:随着NAS含量增加,共聚物水溶液的低临界溶解温度(LCST)逐渐升高,温敏性降低;盐的引入使P(DEAM.CO—NAS)水溶液的LCST降低,所引入盐的阴离子价数越高,影响程度越大;有机酸的引入使P(DEAM—CO—NAS)水溶液的LCST降低;NaOH、乙二胺、丁二胺的引入使P(DEAM—CO—NAS)水溶液的LCST升高,二胺对P(DEAM.CO—NAS)水溶液温敏性影响程度要大于Na
3、OH.关键词:温敏性;聚(N,N-~L基丙烯酰胺一CO—N-丙烯酸琥珀酰亚胺);低临界溶解温度;介质;环境效应中图分类号:0648SynthesisofP(DEAM-CO-NAS)andtheEnvironmentalEffectsofItsTemperatureSensitivityZHANGSaLIUShou—XinHANXiao—YuDANGLiQIXiao—JunrANGXi(KeyLaboratoryofAppliedSurfaceandColloidChemistry,MinistryofEducation,SchoolofChemistryandMate
4、rialsScience,ShaanxiNormalUniversity,Xian710062,PR.China)Abstract:Poly(N,N-diethylacrylamide—CO—N-acryloxysuccinimide)(P(DEAM—CO-NAS))wassynthesizedbyfreeradicalsolutionpolymerizationandcopolymerizationratiosof7.9:1,3.5:1,2.5:1,2:1,1.5:1wereused.Thecopolymerstructureswerecharacterizedby
5、Fouriertransforminfrared(FTIR)spectrometryandnuclearmagneticresonance(HNMR1.ThecopolymercompositionsandthepropertiesofthemediumenvironmentlargelyinfluencethetemperaturesensitivitiesofthePrDEAM—CO—NAS)aqueoussolutions.ThelowercriticalSOlutiontemperature(LCST)oftheP(DEAM.CO—NAS、aqueousSOl
6、utionincreasedwithanincreaseintheNAScontent.TheadditionofsaltsresultedinalineardecreaseintheLCSTofthePfDEAM—CO—NAS)aqueoussolutionandthisdependedontheanionvalenceofthesalts.TheadditionoforganicacidscanreducetheLCSToftheP(DEAM—CO—NAS)aqueoussolution.Moreover,theadditionofNaOH,ethylenedia
7、mine,andputrescineleadstoanincreaseintheLCSToftheP(DEAM—CO—NAS)aqueoussolution.TheeffectsofethylenediamineandputrescineontheLCSToftheP(DEAM-CO—NAS)aqueoussolutionweregreaterthanthatofNaOH.KeyWords:Temperaturesensitivity;Poly(N,N-diethylacrylamide—co-N-acryloxysuccinimide);Lower
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