PDA胶体制备工艺的改进研究
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摘要
本文对PDA胶体的一次性加料法和活泼单体补加法制备工艺进行了改进研究。以工业单体P_4和简单精制工业单体P_4为原料,加入金属离子螯合剂Na_4EDTA,使用过硫酸铵—亚硫酸氢钠引发体系,探索了一次性加入原料和一次性加入引发剂合成10%和20%阳离子度PDA的聚合反应工艺条件;通过对工艺条件的初步探索实验和正交优化实验,以简单精制工业单体P_4为原料制得10%和20%阳离子度PDA的特征粘度分别为15.50 dL·g~(-1)和10.50 dL·g~(-1)。以工业单体P_4为原料,加入金属离子螯合剂Na_4EDTA,使用过硫酸铵—四甲基乙二胺引发体系,探索了一次性加入引发剂,活泼单体补加法合成30%阳离子度PDA的聚合反应工艺条件;通过对工艺条件的初步探索实验和正交优化实验,制得30%阳离子度PDA的特征粘度和阳离子转化率分别为7.50 dL·g~(-1)和55%。
Preparation technology of polymer PDA by one-stage addition of monomers and stage-addition of active monomers was improved in this paper.Using industrial cationic monomer solution P4 or its simply refined solution as monomer ,and Na4EDTA as a chelate agent for metal ions ,adopting redox complex of ammonium persulfate and sodium hydrogen sulfite as an initiator,polymerization technologies of the PDA with cationicity 10% and 20% were investigated by one-stage addition of monomers and initiator.Through a series of preliminary experiments and orthonormal experiments of technological parameters,the intrinsic viscosity of the PDA product with cationicity 10% and 20% reached 15.50 dL g-1 and 10.50 dL g-1, respectively ,by use of simply refined industrial monomer P4 as a monomer under optimum conditions. Using industrial cationic monomer solution P4 as a monomer and Na4EDTA as a chelate agent for metal ions,adopting redox complex of ammonium persulfate and N,N,N',N'-Tetramethyl-ethylenediamine as an initiator,polyme
    rization technology of the PDA with cationicity 30% was investigated by one-stage addition of initiator and stage-addition of active monomers.Through a series of preliminary experiments and orthonormal experiments of technological parameters,the intrinsic viscosity and cationic convertion rate of the PDA product with cationicity 30% reached 7.50 dL-g'1 and 55% under optimum condition, respectively.
引文
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