三元共聚高吸水树脂CTS/AMPS/AM的合成和热分解动力学研究

Preparation and thermal decomposition kinetics of three component copolymer super absorbent resin CTS/AMPS/AM

以壳聚糖(CTS)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和丙烯酰胺(AM)为单体,N,N-亚甲基双丙烯酰胺(NMBA)为交联剂,采用静置热聚合法合成三元共聚高吸水树脂CTS/AMPS/AM.通过FT-IR和SEM对树脂的结构进行表征;并利用TG-DTG技术研究了树脂在氮气气氛中的热分解动力学.结果表明三元共聚高吸水树脂CTS/AMPS/AM的热分解平均活化能及指前因子分别为:E=125.00 kJ/mol,lg(A/s-1)=9.77;其分解反应微分函数为:f(α)=6(1-α)2/3[1-(1-α)1/3]1/2;积分函数为:g(α)=[1-(1-α)1/3]1/2,对应的热分解反应方程为:dα/dT=6(1-α)2/3[1-(1-α)1/3]1/2(5.89×109/β)(-125.00×103exp/RT).

Using chitosan（ CTS）,2- acrylamido- 2- methylpropane sulfonic（ AMPS） and acid acrylamide（ AM） as raw materials,N,N-methylene bis acrylamide（ NMBA） as cross-linking agent,three component copolymer super absorbent resin CTS / AMPS / AM was prepared by static thermal polymerization. The resin structure was characterized by FT- IR and SEM. The thermal decomposition process of resin was studied with TG- DTG technology.The results show that the activation energy,the pre-exponential factor and the order of the thermal decomposition reaction（ n） were about E = 125.00 k J / mol,lg（ A /s^-1） = 9.77 and n = 1 /2 respectively.The differential mechanism function f（α）=6（1-α）^2/3[1-（1-α）^1/3]^1/2 the integral function g（α）=[1-（1-α）^1/3]^1/2.And the thermal decomposition reaction formula was：dα/dT=6（1-α）^2/3[1-（1-α）^1/3]^1/2（5.89×10^9/β）（-125.00×10^3exp/RT）.