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研究了淀粉与丙烯酰胺接枝共聚反应动力学。聚合速度(R_p)和平均聚合度((?)_n)可分别表示为: R_p=k_pe~(E/RT)[Mn~(+7)]~(0.5)[S]~(0.5)[H_2SO_4]~(1.0)[AM]~(1.0) (?)_n=K·[AM]~(1.0)/[Mn~(+7)]~(0.5)[S]~(0.5)[H_2SO+4]~(1.0)计算出表观活化能E=23.8kJ/mol,聚合度对数(ln~(?)_n)和1/T呈线性关系。试验证实反应符合游离基历程;淀粉是参加链引发的主要组份之一;链终止以双基结合为主。
The kinetics of graft copolymerization between starch and acrylamide was studied. The polymerization rate (R_p) and the average degree of polymerization ((?) _n) can be expressed as follows: R_p = k_pe ~ (E / RT) [Mn ~ (+7)] ~0.5 [S] ~0.5 [H_2SO_4 ]] ~ (1.0) [AM] ~ (1.0)? N_K · [AM] ~ (1.0) / [Mn ~ (+7)] ~ (0.5) [S] ~ (0.5) [H_2SO + 4 ] ~ (1.0), the apparent activation energy E = 23.8kJ / mol was calculated and the logarithm of the polymerization degree (ln ~ (?) _n) was linear with 1 / T. The experiment confirmed that the reaction was in accordance with the free radical process. Starch was one of the main components involved in chain initiation.