不同特性黏度聚甲基丙烯酰氧乙基三甲基氯化铵的制备

Preparation of poly(methacryloyloxyethyltrimethyl ammonium chloride)with different intrinsic viscosities

以甲基丙烯酰氧乙基三甲基氯化铵(DMC)作为单体,通过自由基聚合制备了聚甲基丙烯酰氧乙基三甲基氯化铵(PDMC),并用红外光谱和核磁共振氢谱进行结构表征。采用正交实验考察DMC用量、反应温度、引发剂和引发助剂用量对PDMC特性黏度的影响。结果表明:当单体用量为40%、反应温度为65℃、K_(2)S_(2)O_(8)用量为0.70%(对DMC质量)、Na_(4)EDTA用量为0.04%(对DMC质量)、反应时间为5 h时,PDMC的特性黏度为1.81 dL/g。在正交实验优化的基础上,采用不同用量的DMC制备了不同特性黏度的PDMC。PDMC对硅藻土废水有良好的絮凝能力,在絮凝实验条件相同的情况下,特性黏度越大,絮凝效果越好。

Poly(methacryloyloxyethyl trimethylammonium chloride)(PDMC)was prepared by radical polymerization using methacryloyloxyethyl trimethylammonium chloride(DMC)as monomer.The structure of PDMC was characterized by IR and 1H NMR.The effects of DMC amount,reaction temperature,initiator and initiator on the intrinsic viscosity of PDMC were investigated by orthogonal experiment.The results showed that the intrinsic viscosity of PDMC was 1.81 dL/g when the amount of monomer was 40%,the reaction temperature was 65℃,the amount of K_(2)S_(2)O_(8) was 0.70%(on the mass of DMC),the amount of Na_(4)EDTA was 0.04%(on the mass of DMC),and the reaction time was 5 h.On the basis of orthogonal experiment,PDMC with different intrinsic viscosity were prepared by using different amount of DMC.PDMC has good flocculation ability for diatomite wastewater.Under the same experimental conditions,the higher the intrinsic viscosityis,the better the flocculation abilityis.