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Compatibilizer in waste tire powder and low‐density polyethylene blends and the blends modified asphalt
Author(s) -
Ouyang Chunfa,
Gao Qun,
Shi Yutao,
Shan Xiaoqian
Publication year - 2011
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.34634
Subject(s) - low density polyethylene , materials science , maleic anhydride , ultimate tensile strength , composite material , polyethylene , polymer blend , toughness , softening point , copolymer , polymer
With the increasing ratio of waste tire powder (WTP) to low‐density polyethylene (LDPE), the hardness and tensile strength of the WTP/LDPE blends decreased while the elongation at break increased. Five kinds of compatibilizers, such as maleic anhydride‐grafted polyethylene (PE‐ g ‐MA), maleic anhydride‐grafted ethylene‐octene copolymer (POE‐ g ‐MA), maleic anhydride‐grafted linear LDPE, maleic anhydride‐grafted ethylene vinyl‐acetate copolymer, and maleic anhydride‐grafted styrene‐ethylene‐butylene‐styrene, were incorporated to prepare WTP/LDPE blends, respectively. PE‐ g ‐MA and POE‐ g ‐MA reinforced the tensile stress and toughness of the blends. The toughness value of POE‐ g ‐MA incorporating blends was the highest, reached to 2032.3 MJ/m 3 , while that of the control was only 1402.9 MJ/m 3 . Therefore, POE‐ g ‐MA was selected as asphalt modifier. The toughness value reached to the highest level when the content of POE‐ g ‐MA was about 8%. Besides that the softening point of the modified asphalt would be higher than 60°C, whereas the content of WTP/LDPE blend was more than 5%, and the blends were mixed by stirring under the shearing speed of 3000 rpm for 20 min. Especially, when the blend content was 8.5%, the softening point arrived at 82°C, contributing to asphalt strength and elastic properties in a wide range of temperature. In addition, the swelling property of POE‐ g ‐MA/WTP/LDPE blend was better than that of the other compalibitizers, which indicated that POE‐ g ‐MA /WTP/LDPE blend was much compatible with asphalt. Also, the excellent compatibility would result in the good mechanical and processing properties of the modified asphalt. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011