CAJ | 학술논문

实验以聚乙烯醇(PvA)1788和PVA1799作复合保护胶体,二烷基硫酸钠(SDS)和壬基酚聚氧乙烯醚(OP-10)作复合乳化剂,乙二醛为交联剂,过硫酸钾(KPS)为引发剂,反应温度为(75±2)℃,以种子半连续乳液聚合工艺,引入不饱和羧酸单体,合成改性的聚乙酸乙烯酯(PVAc)乳液.采用单体滴加工艺,考察了配方中丙烯酸丁酯(BA)、不饱和羧酸单体甲基丙烯酸(MAA)、保护胶体聚乙烯醇(PVA)以及乳化剂对乳液性能和聚合过程的影响;实验结果表明,BA用量(相对于配方中单体总质量)1%～9%、w(MAA)=4.5%到改性PVAc乳液中,改性PVAc乳液冻融循环6次,-18℃冻结6个月融化后可恢复良好流动性,是一种抗冻性及贮存稳定性优良的乳液胶黏剂.
실험이취을희순(PvA)1788화PVA1799작복합보호효체,이완기류산납(SDS)화임기분취양을희미(OP-10)작복합유화제,을이철위교련제,과류산갑(KPS)위인발제,반응온도위(75±2)℃,이충자반련속유액취합공예,인입불포화최산단체,합성개성적취을산을희지(PVAc)유액.채용단체적가공예,고찰료배방중병희산정지(BA)、불포화최산단체갑기병희산(MAA)、보호효체취을희순(PVA)이급유화제대유액성능화취합과정적영향;실험결과표명,BA용량(상대우배방중단체총질량)1%～9%、w(MAA)=4.5%도개성PVAc유액중,개성PVAc유액동융순배6차,-18℃동결6개월융화후가회복량호류동성,시일충항동성급저존은정성우량적유액효점제.
Using anionic emulsifier SDS and nonionic emulsifier OP-10 as composite emulsifier and potassium persulfate as initiator and oxaldehyde as crosslinker,a new kind of vinyl acetate copolymer emulsion modified by methacrylic acid(MAA)was synthesized by seed emulsion at(75±2)℃.With mixed-monomer adding techniques,the effects of butyl acrylate(BA),MAA,protective colloids PVA and emulsifier on the properties of the emulsion and the emulsion polymerization process were examined.The results indicated that the properties of the copolymer emulsion is excellent with 1%-9%BA(based on total monomers in the formulation)and 4.5%MAA;there is a no great change after 6 time of freeze-thaw cycle;product re-melted after frozen for 6 months also exhibited good flow ability.It can be used as an excellent emulsion adhesive for porous material.