Terahertz Dielectric Spectroscopic Analysis of Polypropylene Aging Caused by Exposure to Ultraviolet Radiation
文献类型：期刊论文
| 作者 | Chang, Tianying2,3; Zhang, Xiansheng3; Cui, Hong-Liang1,2
|
| 刊名 | POLYMERS
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 11期号:12页码:12 |
| 关键词 | polypropylene ultraviolet aging THz dielectric spectroscopy |
| DOI | 10.3390/polym11122001 |
| 通讯作者 | Chang, Tianying(tchang@jlu.edu.cn) |
| 英文摘要 | Terahertz dielectric spectroscopy is shown to be an effective tool for bench-marking ultraviolet aging of polypropylene. In this, thin-film polypropylene samples exposed to standard artificial ultraviolet radiation in accelerated aging from 1 day to 30 days are closely monitored by a terahertz time-domain spectroscopy system and analyzed using an effective data processing method. It is found that the terahertz absorption of the polypropylene samples is generally weak and the terahertz dielectric constant varies slightly though discernibly during the aging process, with the refractive index decreasing slightly with increasing length of ultraviolet exposure. Nonetheless, the rate of variation of the polypropylene refractive index with increasing terahertz frequency exhibits a drastic inflection around the 15-days aging point and the rate changes suddenly from positive value to negative value. Based on this prominent and consistent THz dielectric spectroscopic feature of the aging process, an efficient judging criterion is established to distinguish the early-term, mid-term, and late-term phases as well as the degree of polypropylene ultraviolet aging, corresponding to the fundamental transformation of the polymer material from a nonpolar to a polar substance at a critical level of oxidation induced by ultraviolet radiation. |
| 资助项目 | National Natural Science Foundation of China[61705120] ; Natural Science Foundation of Shandong Province[ZR2019PF008] |
| WOS研究方向 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000507624500094 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/10176]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Chang, Tianying |
| 作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 2.Jilin Univ, Coll Instrumentat & Elect Engn, Changchun 130061, Peoples R China 3.Qilu Univ Technol, Shandong Acad Sci, Inst Automat, Jinan 250014, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang, Tianying,Zhang, Xiansheng,Cui, Hong-Liang. Terahertz Dielectric Spectroscopic Analysis of Polypropylene Aging Caused by Exposure to Ultraviolet Radiation[J]. POLYMERS,2019,11(12):12. |
| APA | Chang, Tianying,Zhang, Xiansheng,&Cui, Hong-Liang.(2019).Terahertz Dielectric Spectroscopic Analysis of Polypropylene Aging Caused by Exposure to Ultraviolet Radiation.POLYMERS,11(12),12. |
| MLA | Chang, Tianying,et al."Terahertz Dielectric Spectroscopic Analysis of Polypropylene Aging Caused by Exposure to Ultraviolet Radiation".POLYMERS 11.12(2019):12. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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