氧化还原引发体系下双层自交联丙烯酸核壳乳液的合成  

Synthesis of Bilayer Self-Crosslinking Acrylic Core-Shell Emulsions in Redox Initiation System

作　　者：亓子怡 程相林[1] 唐雅馨 洪涛 高明奇 Ziyi Qi;Xianglin Cheng;Yaxin Tang;Tao Hong;Mingqi Gao(School of Chemical Engineering of Zhengzhou University,Zhengzhou 450001,China;China Tobacco Henan Industrial Co.,LTD.,Zhengzhou 450000,China)

机构地区：[1]郑州大学化工学院,河南郑州450001 [2]河南中烟工业有限公司,河南郑州450000

出　　处：《高分子材料科学与工程》2025年第1期10-18,共9页Polymer Materials Science & Engineering

摘　　要：以苯乙烯(St)、甲基丙烯酸甲酯(MMA)为硬单体,丙烯酸丁酯(BA)为软单体,乙烯基三甲氧基硅烷(A-171)和双丙酮丙烯酰胺(DAAM)分别为核层和壳层的交联单体,合成了室温自交联改性核壳结构丙烯酸酯乳液,探究了引发体系的选择与用量、交联单体种类和添加量对乳液聚合的影响。通过衰减全反射傅里叶变换红外光谱证明交联单体成功交联,通过Zeta电位分析、透射电镜对乳液进行表征,证明成功合成了均一的核壳乳液。结果证明,以半连续种子乳液聚合法聚合,引发剂KPS和NaHSO_(3)质量比为2:1、引发剂用量为0.4%、核层自交联单体乙烯基三甲氧基硅烷(A-171)和壳层自交联单体双丙酮丙烯酰胺(DAAM+ADH)的质量分数分别为3%和2%,乳液的稳定性、耐水性和成膜性良好,转化率在90%以上,吸水率为6.87%,钙离子稳定性合格。与非核壳无交联单体乳液进行对比,热重分析表明热分解温度提高了41℃,缓解了传统水性丙烯酸酯乳液涂层耐水性差、耐溶剂性差、“热粘冷脆”的问题。Using styrene(St)and methyl methacrylate(MMA)as hard monomer,butyl acrylate(BA)as soft monomer,vinyltrimethoxysilane(A-171)and diacetone acrylamide(DAAM)as crosslinking monomer in the core and shell layers,respectively,the self-crosslinking modified core-shell acrylate emulsions were synthesized at room temperature.The effects of initiator type and dosage,crosslinking monomer addition on emulsion polymerization were investigated.Successful cross-linking of the cross-linking monomers was proved by ATRFTIR,and the emulsions were characterized by DLS and TEM,which proved the successful synthesis of homogeneous core-shell emulsion.The results prove that the emulsions were polymerized by semi-continuous seed emulsion polymerization with the initiator m(KPS):m(NaHSO_(3))=2:1,the initiator dosage of 0.4%,and the mass fractions of self-cross-linking monomer vinyltrimethoxysilane(A-171)in the core layer and self-crosslinking monomer bis(acetone acrylamide)(DAAM+ADH)in the shell layer of 3%and 2%,respectively,and the emulsions have good stability,water resistance and film-forming property,with the conversion rate above 90%,water absorption rate above 90%,the water absorption rate is 6.87%,and the calcium ion stability is qualified.Compared with the non-crosslinked monomer emulsion without core-shell,the thermal decomposition temperature of TG is increased by 41℃,which alleviates the problems of poor water resistance,poor solvent resistance,and"hot sticking and cold brittleness"of water-based ink coating.

关 键 词：核壳乳液 氧化还原引发体系 核壳双层交联 水性油墨连接料 

分 类 号：TQ638[化学工程—精细化工]