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本文分别研究了高速搅拌下聚氧化乙烯(PEO)和聚丙烯酰胺(PAM)在水溶液中的降解规律以及PEO与PAM的共聚反应。用曲线拟合法得到了高速搅拌降解动力学方程。PEO/PAM水溶液在氮气氛下通过高速搅拌能生成共聚物,后者经质谱法(MS)、差热分析法(DTA)、扫描电子显微法(SEM)鉴定得到确认。根据高分辨核磁共振氢谱(~1H-NMR)、红外光谱(IR)、MS分析结果,可以认为所得共聚物为嵌段共聚物。从X-射线衍射和偏光显微镜观察到共聚物中既有PEO结晶区,也有PAM无规区。共聚物产率与溶液浓度,搅拌速度和搅拌时间有关。将浓度为1％的PEO/PAM(1:1重量比)水溶液在20±3℃,20000rpm转速下搅拌10分钟,共聚物产率达66.6％。
In this paper, the degradation rules of PEO and PAM in aqueous solution and the copolymerization of PEO and PAM were studied respectively under high speed stirring. The kinetic equation of high speed stirring and degradation was obtained by curve fitting method. Copolymers of PEO / PAM aqueous solution were obtained by stirring at high speed under a nitrogen atmosphere. The latter was identified by MS, DTA and SEM. According to the results of 1H NMR, IR and MS, the copolymer can be considered as a block copolymer. From the X-ray diffraction and polarized light microscopy, it is observed that the copolymer has both PEO crystallization zone and PAM irregular zone. Copolymer yield and solution concentration, stirring speed and mixing time. The concentration of 1% PEO / PAM (1: 1 weight ratio) aqueous solution at 20 ± 3 ℃, 20000rpm speed for 10 minutes, the copolymer yield of 66.6%.