高固含量PAMDAST-541无皂乳液的合成及其在再生瓦楞纸浆中的应用

Synthesis of High Solid Content Soap-free Emulsion of PAMDAST-541 and Its Applications in Recycled Corrugated pulp

以丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DADMAC)、苯乙烯(ST)为原料,在反应温度是55℃、单体总质量分数是50%、m(AM):m(DADMAC):m(ST)=5:4:1下,采用无皂乳液聚合技术合成了AM-DADMAC-ST三元共聚物(简称PAMDAST-541),并探讨了该聚合物在再生瓦楞纸浆中应用结果。研究结果表明,PAMDAST-541的添加量为0.3%时,纸张的抗张指数从20.56 Nm·g^(-1)增至26.72Nm·g^(-1);环压指数从5.08 Nm·g^(-1)增至7.22Nm·g^(-1);打浆度从45.5°SR降至39°SR;白水浊度从45NTU降至31.1NTU。

AM-DA-ST copolymers（referred to as PAMDAST-541） was synthesized by soap-free emulsion polymerization with acrylamide（AM）,dimethyl diallyl ammonium chloride（DADMAC）,and styrene（ST） under the conditions of m（AM）：m（DADMAC）：m（ST）=5：4：1,55℃,and w（monomers）=50%.The application of the copolymer on recycled corrugated pulp was investigated.The results showed that the tensile index of paper was increased from 20.56 Nm·g（-1） to 26.72Nm·g（-1）;the ring pressure index from 5.08 Nm·g（-1） to 7.22 Nm·g（-1） at the PAMDAST-541 dosage of 0.3%.The beating degree was decreased from 45.5°SR to 39°SR, and the turbidity of white water from 45NTU to 31.1NTU at the same dosage.