低密度聚乙烯
聚烯烃
高密度聚乙烯
线性低密度聚乙烯
聚合物
材料科学
差示扫描量热法
聚丙烯
聚乙烯
化学工程
战术性
降级(电信)
扫描电子显微镜
高分子化学
无定形固体
结晶度
复合材料
有机化学
化学
聚合
电信
工程类
计算机科学
图层(电子)
物理
热力学
作者
Adchara Padermshoke,Tomoko Kajiwara,Yingjun An,Mamiko Takigawa,Toan Van Nguyen,Hiroyasu Masunaga,Yutaka Kobayashi,Hiroshi Ito,Sono Sasaki,Atsushi Takahara
出处
期刊:Polymer
[Elsevier]
日期:2022-12-01
卷期号:262: 125455-125455
被引量:16
标识
DOI:10.1016/j.polymer.2022.125455
摘要
The effects of oxo-biodegradable additives on the photo-oxidation of four types of polyolefin polymers, namely high-density polyethylene (HDPE), low-density PE (LDPE), linear low-density PE (LLDPE), and isotactic polypropylene (itPP) were investigated. Scanning electron microscopy, infrared spectroscopy, differential scanning calorimetry, and wide- and small-angle X-ray scattering were employed to gain insights into the chemical and structural modifications induced by the degradation process. The photo-oxidation preferentially occurred at the sample surface and was favored in the amorphous region of the polymers. The carbonyl index calculated for the neat and additive-containing samples suggested that the additives promoted the photo-oxidative degradation, particularly of the PE polymers, which are intrinsically resistant to oxidation, without altering their degradation pathways. The overall degradation rate of the additive-containing polymers was in the order of itPP > LDPE > LLDPE > HDPE.
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