The effect of modifiers on the stability of a vinyl acetate/ethylene copolymer dispersion     

Jane L. Down 《文物保护研究》2016,61(1):26-45

This paper examines the effect of modifiers on the stability of a vinyl acetate/ethylene copolymer dispersion adhesive upon aging. Eighteen common modifiers were added to a well-characterized vinyl acetate/ethylene copolymer dispersion (Dur-O-Set^® E-150) in known concentrations and dry-film samples were subjected to 16–17 years of dark aging and seven to eight years of light aging. Yellowing, pH, gloss, swelling, cohesive strength, and flexibility were monitored for changes upon aging. Generally, the neat Dur-O-Set^® E-150 (no additives) was found to become acidic on aging, but was fairly resistant to yellowing. It also swelled substantially in toluene, was of high gloss, medium strength, and flexible, and remained so on aging. No modifier was found to improve these properties. Various solvents, wetting agents, and thickeners did not alter the properties by much, while plasticizers, freeze-thaw stabilizer, glycerin, and certain fillers had a more negative effect.  相似文献   

塑化剂风波对方便面包装材料的影响   总被引：1，自引：0，他引：1  

许月明 《巢湖学院学报》2012,(3):98-101

食品安全关系到人类健康,食品包装安全更是不容忽视。经过塑化剂事件,安全的食品包装材料已成为市场的主流趋势。加快技术创新,研制包装新材料、新工艺和新产品,是开拓新型安全包装材料的关键。方便面包装涉及面饼的外包装与酱包、粉包、蔬菜包的内包装,继续采用塑料包装风险性较大,可食性方便面包装膜便是一种既实用又安全环保的新型方便面包装材料。  相似文献