Sub-Rouse Mode Relaxation in Ethylene-propylene-diene Rubber above Glass Transition
文献类型：期刊论文
| 作者 | Cao, Hang1,2; Gu, Zhen3 ; Chen, Zhao2; Li, Shi-yuan2; Zheng, Kang2; Qin, Yong1; Tian, Xing-you2; Zhang, Xian2
|
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 2016-09-20 |
| 期号 | 9页码:1206-1211 |
| 关键词 | Epdm Relaxatio'n Time Coupling Model Intermolecular Cooperativity |
| DOI | 10.11777/j.issn1000-3304.2016.15379 |
| 文献子类 | Article |
| 英文摘要 | The chain relaxation behavior of ethylene-propylene-diene rubber (EPDM) was investigated by dynamic mechanical analysis (DMA). The results indicated that there were three tan delta peaks for EPDM at low frequencies, which were attributed to glass transition (alpha transition), sub-Rouse mode (alpha' transition) and Rouse mode (alpha" transition), respectively. In addition, compared with the glass transiton, sub-Rouse mode has a much stronger frequency-dependence, showing that the sub-Rouse mode moves to high temperature faster than the a mode with the augment of frequency, which is sensible and consistent with the previous works as the local segmental motions are moreinter molecularly coupled than the sub-Rouse mode relaxation in polymers, such as PS, PVAc and PMMA. After comprehensive analyses of frequency-domain spectra of EPDM via figuring out the temperature dependence of relaxation time, relaxation strength, coupling parameter and shape parameter, a dynamic crossover at T-B 384 K was found in sub-Rouse (alpha') mode. What' s more, the crossover relaxation time T-alpha' (T-B) is calculated as 0. 11 s, approximately, which is remarkably close to that of PS, PVAc and PVAc/ PEO blends (10((-0.5 +/- 0.5))s), indicating that this crossover arises at a particular point of relaxation time. According to the coupling model, the crossover is suggested to be caused by the strong increase of intermolecular cooperativity below T-B. |
| WOS关键词 | MECHANICAL SPECTROSCOPY ; POLYMERS ; DYNAMICS ; POLYISOBUTYLENE ; CROSSOVER ; LIQUIDS |
| WOS研究方向 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000384870700006 |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/30168]  |
| 专题 | 合肥物质科学研究院_中科院固体物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Appl Technol, Hefei 230088, Peoples R China 3.Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, Hang,Gu, Zhen,Chen, Zhao,et al. Sub-Rouse Mode Relaxation in Ethylene-propylene-diene Rubber above Glass Transition[J]. ACTA POLYMERICA SINICA,2016(9):1206-1211. |
| APA | Cao, Hang.,Gu, Zhen.,Chen, Zhao.,Li, Shi-yuan.,Zheng, Kang.,...&Zhang, Xian.(2016).Sub-Rouse Mode Relaxation in Ethylene-propylene-diene Rubber above Glass Transition.ACTA POLYMERICA SINICA(9),1206-1211. |
| MLA | Cao, Hang,et al."Sub-Rouse Mode Relaxation in Ethylene-propylene-diene Rubber above Glass Transition".ACTA POLYMERICA SINICA .9(2016):1206-1211. |
入库方式： OAI收割
来源：合肥物质科学研究院
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