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乙烯基类单体与淀粉的接枝共聚反应(Ⅰ)——Ce4+引发甲基丙烯酸甲酯与玉米淀粉接枝共聚的反应规律
Graft Copolymerization of Vinyl Monomers onto Starch(Ⅰ) ——The Regularities of Graft Copolymerization of Methyl Methacrylate onto Starch Using Ge4+ as Initiator
【摘要】 本文以Ce(NH4)2(NO3)6为引发剂,研究了甲基丙烯酸甲酯与玉米淀粉接枝共聚的反应规律。实验结果表明,当引发剂浓度为4.5×10-3克分子/升,单体浓度为4.0×10-1克分子/升,30℃或40℃,反应4小时,接枝率较高。在实验结果基础上,探讨了反应机理。
【Abstract】 The successful grafting of methyl methacrylate (MMA) onto corn starch involyes the creation of free radicals on the backbones of starch. In this paper, we have reported the regularities of graft copolymerizafion of MMA onto corn starch using ceric ammonium nitrate as initiator, It was shown that the mnonomer grafting percentage and starch grafting percentage were considerably affected by initiator concertration, monomer concertration, reaction time and temperature, The maximum grafting percentage was obtained at an (Ce4+] of 4.5x10-3mol/l, and [MMA] of 4.0x10-1 mol/l at 30—40℃ and 4 hrs. On the basis of experimental results, a suitable over-all rate equation of grafting copolymerization has been derived.
- 【文献出处】 吉林大学自然科学学报 ,Journal of Jilin University , 编辑部邮箱 ,1986年04期
- 【被引频次】6
- 【下载频次】128