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Synergistic effect of coupling agents on polypropylene‐based wood–plastic composites
Author(s) -
Yeh ShuKai,
Kim KwangJea,
Gupta Rakesh K.
Publication year - 2012
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.37775
Subject(s) - izod impact strength test , polypropylene , ultimate tensile strength , materials science , composite material , maleic anhydride , composite number , wood plastic composite , wood flour , copolymer , young's modulus , modulus , polymer
In this study, polypropylene grafted with maleic anhydride (PP‐ g ‐MA) and styrene ethylene‐ co ‐butylene styrene block copolymer grafted with maleic anhydride (SEBS‐ g ‐MA) were used as coupling agents for polypropylene‐based wood–plastic composites containing 50 wt % wood flour. Adding up to 5 wt % PP‐ g ‐MA to the composite increased the tensile strength of the wood‐plastic composite (WPC) by almost 100% and the reversed‐notch Izod impact strength by more than 100%; the modulus remained essentially unchanged. By contrast, the same amount of SEBS‐ g ‐MA had a greater effect on the impact strength but a smaller influence on the tensile strength; in addition, the modulus was reduced. On using a combination of 2 wt % PP‐ g ‐MA and 1 wt % SEBS‐ g ‐MA, the impact strength of the composite could be increased significantly, but the tensile strength and modulus were not reduced to any appreciable extent relative to the use of PP‐ g ‐MA alone. Because WPCs are building products where minimizing costs is extremely important, this finding has important commercial implications. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013