聚烯烃塑料溶剂提取物影响因素研究

Influencing factors of solvent extracts of polyolefin plastic

目的研究并建立测定聚烯烃树脂二甲苯和正己烷溶剂提取物的最佳方法。方法通过实验研究试样质量与溶剂体积比、过滤方式、样品粒径、蒸干方式、残渣干燥方式和干燥时间对烯烃聚合物树脂正己烷和二甲苯溶剂提取物的影响,确定最佳实验方案。结果聚烯烃溶剂提取物实验的最佳条件为试样质量/溶剂体积比为1 g/100 mL、试样粒径为小于8目筛网孔(二甲苯提取物可不受此限)、二甲苯物实验可不添加抗氧化剂、正己烷提取物过滤方式为滤纸过滤、二甲苯提取物过滤方式为布氏漏斗减压过滤、蒸干方式为水浴蒸干、干燥条件为普通烘箱干燥2h。结论优化实验条件下所得结果与标准条件一致,但优化实验条件成本低、且操作更为简单、快捷。

Objective To investigate and establish the best method for the determination of the polyolefin resin xylene and n-hexane solvent extracts. Methods The best experimental program was obtained by investigating the effects of the ratio of samples’ mass to solvent volume, filtering method, sample particle size, evaporative drying method, residue drying method and drying time on n-hexane and xylene solvent extracts of polyolefin resin. Results The optimal experimental conditions were as follows： the ratio of samples’ mass to solvent volume was 1 g/100 mL, the sample particle size was less than 8 mesh holes（sample particle size of xylene extract could not be limited）, xylene solvent extract could not add antioxidants, filtering methods of n-hexane solvent extract and xylene solvent extract were respectively paper filtration and vacuum filtration with Buchner funnel, evaporative drying method was water bath, and drying condition of residue was in ordinary oven for 2h. Conclusion The same test results are obtained under optimal experimental conditions and standard conditions. However, optimal experimental conditions are less costly, and the operation is more simple and fast.