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对微波法聚合反应制备黄原胶(XG)-丙烯酰(AM)共聚物的工艺条件进行研究。主要考察黄原胶质量浓度、单体配比、引发剂质量浓度、反应时间及微波火力等因素对产品接枝率和接枝效率的影响,探讨黄原胶接枝丙烯酰胺共聚反应的基本规律以及接枝机理;采用红外光谱仪(FT-IR)、元素分析仪(EA)和X射线粉末衍射仪(XRD)对接枝共聚物的结构进行表征。结果表明,最佳反应条件为:XG质量浓度为12g/L,m(AM)∶m(XG)=4∶1,过硫酸铵(APS)质量浓度为2g/L,反应时间为5min,采用微波低火(160W)加热。在最佳反应条件下,产品的接枝率和接枝效率分别为135%和82.1%。
The technological conditions of xanthan gum (XG) -acryloyl (AM) copolymer prepared by microwave polymerization were studied. The effects of factors such as mass concentration of xanthan gum, monomer ratio, initiator concentration, reaction time and microwave firepower on the grafting degree and grafting efficiency of the product were investigated. The basic rules of graft copolymerization of xanthan gum And the grafting mechanism. The structure of the graft copolymer was characterized by FT-IR, elemental analysis (EA) and X-ray powder diffraction (XRD). The results showed that the optimal reaction conditions were as follows: the mass concentration of XG was 12g / L, the mass ratio of ammonium sulfate (APS) was 2g / L, the reaction time was 5min, Microwave low heat (160W) heating. Under the optimal reaction conditions, the grafting yield and grafting efficiency of the product were 135% and 82.1% respectively.