Effect of annealing on the viscoelastic and viscoplastic responses of low-density polyethylene
文献类型：期刊论文
| 作者 | Drozdov, AD; Yuan, Q |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
 |
| 出版日期 | 2003-07-15 |
| 卷号 | 41期号:14页码:1638-1655 |
| 关键词 | Annealing Low-density Polyethylene Relaxation Tension Structure-property Relations |
| ISSN号 | 0887-6266 |
| DOI | 10.1002/polb.10507 |
| 英文摘要 | Two series of tensile tests with constant crosshead speeds (ranging from 5 to 200 mm/min) and tensile relaxation tests (at strains from 0.03 to 0.09) were performed on low-density polyethylene in the subyield region of deformations at room temperature. Mechanical tests were carried out on nonannealed specimens and on samples annealed for 24 h at the temperatures T = 50, 60, 70, 80, and 100 degreesC. Constitutive equations were derived for the time-dependent response of semicrystalline polymers at isothermal deformations with small strains. A polymer is treated as an equivalent heterogeneous network of chains bridged by temporary junctions (entanglements, physical crosslinks, and lamellar blocks). The network is thought of as an ensemble of mesoregions linked with each other. The viscoelastic behavior of a polymer is modeled as a thermally induced rearrangement of strands (separation of active strands from temporary junctions and merging of dangling strands with the network). The viscoplastic response reflects sliding of junctions in the network with respect to their reference positions driven by macrostrains. Stress-strain relations involve five material constants that were found by fitting the observations. Fair agreement was demonstrated between the experimental data and the results of numerical simulation. This study focuses on the effects of strain rate and annealing temperature on the adjustable parameters in the constitutive equations. (C) 2003 Wiley-Periodicals, Inc. |
| 语种 | 英语 |
| WOS记录号 | WOS:000183812400005 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/81501]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Drozdov, AD |
| 作者单位 | 1.W Virginia Univ, Dept Chem Engn, Morgantown, WV 26506 USA 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Drozdov, AD,Yuan, Q. Effect of annealing on the viscoelastic and viscoplastic responses of low-density polyethylene[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2003,41(14):1638-1655. |
| APA | Drozdov, AD,&Yuan, Q.(2003).Effect of annealing on the viscoelastic and viscoplastic responses of low-density polyethylene.JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,41(14),1638-1655. |
| MLA | Drozdov, AD,et al."Effect of annealing on the viscoelastic and viscoplastic responses of low-density polyethylene".JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 41.14(2003):1638-1655. |
入库方式： OAI收割
来源：化学研究所
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