摘要
用纳米二氧化硅与聚丙烯树脂熔融共混,通过改变聚丙烯的结晶度、玻璃化转变温度、溶度参数的手段,来降低聚丙烯对有机溶剂的吸附性、溶解性和扩散性,进而降低印刷后聚丙烯薄膜中有机溶剂的残留。实验表明,纳米二氧化硅能够明显提高聚丙烯的结晶度,提高其玻璃化转变温度,降低聚丙烯无定形区的比例,改性后的聚丙烯不但对非极性溶剂表现出低的残留值,而且对常见极性溶剂的溶解性也有较大程度的降低。
Polypropylene resin was melt blending with nano-silica to reduce the adsorption, solubility, and diffusivity of polypropylene against organic solvent by means of changing crystallinity, glass transition temperature, and solubility parameter of polypropylene. As a result, the solvent residue value of polypropylene film after printing was reduced. The experiments showed that nano-silica can significantly improve crystallinity and glass transition temperature of polypropylene, and reduce the proportion of amorphous region ; the modified polypropylene shows a low residual value against not only non-polar solvent but also common polar solvent.
出处
《包装工程》
CAS
CSCD
北大核心
2013年第7期1-6,共6页
Packaging Engineering
基金
北京市教委人才强教项目(IHLB No.PXM2010_014223_095557)
科委面上项目(KM201110015001
KM2012 1001 5003)
实验室建设项目(PXM2012_014223_000039)
"高分子物理相似相容原理的实践教学"教改项目
关键词
溶剂残留
聚丙烯
包装材料
玻璃化转变温度
溶度参数
solvent residue
polypropylene
packaging materials
glass transition temperature
solubility parameter
