不同溶剂对聚丙烯中抗氧剂168迁移规律的影响  被引量:2

Effect of Different Solvents on Migration of Antioxidant 168 in Polypropylene

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作  者:菅田田 张钦发[1] 刘悦悦 莫宜澄 Jian Tiantian;Zhang Qinfa;Liu Yueyue;Mo Yicheng(College of Food Science,South China Agricultural University,Guangzhou 510640,China)

机构地区:[1]华南农业大学食品学院

出  处:《塑料科技》2018年第11期102-107,共6页Plastics Science and Technology

基  金:广东省质量技术监督局项目(2016ZZ05)

摘  要:研究了含抗氧剂168的聚丙烯(PP)母料的比表面枫溶剂的极性及温度对抗氧剂168向溶剂中迂移规律的影响。结果表明:通过Origin8.5软件进行模拟,抗氧荆168的浸泡时间(t)和浓度(G)符合Ct=A(1-e^-Bt)方程式。且迁移速度和平衡分配系数(溶剂,塑料)睫温度和比表面积的增大而提高,抗氯剂168向正己烷和无水乙醇溶剂中迁移的平衡分配系数(Dr)与比表面积(S)分别符合方程InDr=-3.47+2.98e^-22.3/S和InDr=-6.76+4.29e^-^31.04/S;决定抗氧剂168从PP迁移到溶剂中的迁移量(平衡分配系数)的大小与溶,fLPP和抗氧剂168三者的溶解度参数问的关系有关,即抗氧剂168与PP的溶解度参数差值越大,与溶剂溶解度参数差值越小,溶剂与PP相容性越好(溶解度参数差值越小),则抗氧剂168从PP中的迁移趋势越大,平衡分配系数越高。The effects of specific surface area, polarity of solvent and temperature on the migration of antioxidant 168 to solvent of polypropylene (PP) masterbatch containing antioxidant 168 were studied. The results show that: simulated by Origin 8.5 software, the soaking time(t) and concentration(Ct) of antioxidant 168 conform to the equation of Ct=A(1-e^-Bt), and the migration rate and equilibrium partition coefficient (solvent/plastics) increase with the increase of temperature and specific surface area. The equilibrium partition coefficient value (Dr) with specific surface area (S) of the migration of antioxidant 168 to n-hexane and anhydrous ethanol solvent accord with the equations InD,=-3.47+2.98e^-22'3/s and InDr=-6.76+4.29e^-31.04/s, respectively. The amount of migration (equilibrium partition coefficient) of antioxidant 168 from PP to solvent depends on the solubility parameters of solvent, PP and antioxidant 168. The greater the difference between antioxidant 168 and solubility parameter of plastics is, the smaller the difference between antioxidant 168 and solvent solubility parameter is, the better the compatibility between the solvent and the plastic (the smaller the solubility parameter difference is), the greater the migration trend of antioxidant 168 in PP is and the greater the equilibrium distribution coefficient is.

关 键 词:聚丙烯 抗氧剂168 平衡分配系数 溶解度参数 

分 类 号:TQ325.14[化学工程—合成树脂塑料工业] TS206.4[轻工技术与工程—食品科学]

 

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