萜类有机分子在不同聚烯烃材质中的渗透行为  

Permeation abilities of terpenoid in different types of polyolefins

作　　者：姚雪容[1] 郑萃 李娟[1] 刘宣伯[1] 施红伟[1] 张韬毅[1] Yao Xuerong;Zheng Cui;Li Juan;Liu Xuanbo;Shi Hongwei;Zhang Taoyi(Sinopec Beijing Research Institute of Chemical Industry,Beijing 100013,China)

机构地区：[1]中国石化北京化工研究院

出　　处：《石油化工》2019年第10期1015-1019,共5页Petrochemical Technology

摘　　要：以萜类有机分子C10H18O为扩散物质,利用渗透实验考察了C10H18O在不同类型和不同结晶度的聚乙烯和聚丙烯材质中的渗透能力。实验结果表明,随聚乙烯和聚丙烯包装结晶度的降低,C10H18O在其中的扩散系数和渗透系数增大。对于相同结晶度的聚乙烯和聚丙烯包装,C10H18O在聚乙烯包装中的渗透系数和扩散系数大于它在聚丙烯包装中的值,但在两种包装中的溶解度系数差别不大。当乙烯共聚物中存在大且刚性的单体时,由于分子链运动能力减弱,即使结晶度很低,对萜类有机分子的阻隔效果也很好。Permeation experiments of terpenoid C10H18O as diffusive substance were performed on different types of polyethylene(PE) and polypropylene(PP) with various crystallinities. The results indicate that the diffusion coefficient and the permeation coefficient of C10H18O increase with the decrease in the crystallinities of the PE and PP packages. And the permeation coefficient and the diffusion coefficient of C10H18O in PE package are higher than those in PP package which has the same crystallinity with PE,while the difference in the solubility coefficient is not huge. In copolymer of ethylene with big and rigid comonomer,although the crystallinity is low,the permeability of terpenoid can be significantly hindered due to the weakened molecular chain mobility.

关 键 词：聚乙烯 聚丙烯 萜类有机分子 渗透 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]