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Wood plastic composites by melt impregnation: Polymer retention and hardness
Author(s) -
Zhang Yaolin,
Zhang S. Y.,
Chui Ying Hei,
Wan Hui,
Bousmina Mosto
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24120
Subject(s) - brinell scale , materials science , polyethylene , composite material , polymer , maple , wood plastic composite , composite number , ultimate tensile strength , botany , biology
Wood plastic composites were prepared through impregnation of solid wood with polyethylene. The effects of impregnation parameters on polymer retention and hardness were investigated. A screening strategy of 16‐run resolution IV design for seven factors at two levels was adopted. The seven factors were: ratio of maleated polyethylene in formulations, ratio of polyethylenes with different molecular weights, four process factors (vacuum, pressure, time, and temperature), and wood species (red maple and aspen). Polymer retention (PR) and Brinell hardness ( H B ) were investigated and discussed on the basis of the impregnation parameters. The present work showed that process parameters (pressure and temperature), polymer impregnants (different molecular weight polyethylenes), and wood species contributed significantly to PR and H B . Increasing pressure and temperature resulted in a higher PR and H B , whereas increasing the molecular weight of polyethylene and switching wood species from aspen to red maple gave a lower PR and H B . This study was aimed at understanding how impregnation parameters affect the final properties of wood plastic composites and developing an optimal fabrication process for wood plastic composites. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1672–1680, 2006