ICCAS OpenIR
Effect of annealing on the viscoelastic and viscoplastic responses of low-density polyethylene
Drozdov, AD; Yuan, Q
2003-07-15
Source PublicationJOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
ISSN0887-6266
Volume41Issue:14Pages:1638-1655
AbstractTwo 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.
KeywordAnnealing Low-density Polyethylene Relaxation Tension Structure-property Relations
DOI10.1002/polb.10507
Indexed BySCI
Language英语
WOS IDWOS:000183812400005
PublisherJOHN WILEY & SONS INC
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81502
Collection中国科学院化学研究所
Corresponding AuthorDrozdov, AD
Affiliation1.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
Recommended Citation
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.
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