Premium
Separating stress and time dependent effects in the temperature dependent creep of polyethylene nanocomposites
Author(s) -
Shaito Ali,
Fairbrother Debora,
Sterling Jerry,
D'Souza Nandika Anne
Publication year - 2010
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21590
Subject(s) - creep , materials science , viscoelasticity , linear low density polyethylene , superposition principle , composite material , stress (linguistics) , polyethylene , nanocomposite , nonlinear system , montmorillonite , mathematics , mathematical analysis , linguistics , philosophy , physics , quantum mechanics
Abstract The nonlinear time dependent creep of linear‐low density polyethylene (LLDPE) reinforced with montmorillonite layered silicate was investigated. A previous study related the time/stress dependence of creep compliance of the material at room temperature using the Burger and Kohlrausch‐Williams‐Watts models. Using both the creep and recovery compliance curves, we employ the Schapery formulation to study the relationship between deformation, time, stress, and temperature of LLDPE nanocomposites. Smooth mastercurves are constructed using time–temperature–stress superposition principles. The stress and temperature‐related creep constants and shift factors were determined for the material using the Schapery nonlinear viscoelastic equation. The prediction results confirm the enhanced creep resistance of nanofillers even at extended time scales and low temperatures. POLYM. ENG. SCI., 50:1646–1657, 2010. © 2010 Society of Plastics Engineers