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Thermal properties and morphology of recycled poly(ethylene terephthalate)/maleic anhydride grafted linear low‐density polyethylene blends
Author(s) -
Zhang Hongsheng,
Zhang Yue,
Guo Weihong,
Xu Dongdong,
Wu Chifei
Publication year - 2008
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.28456
Subject(s) - linear low density polyethylene , materials science , crystallinity , reactive extrusion , polyethylene terephthalate , maleic anhydride , copolymer , polymer chemistry , composite material , polymer blend , crystallization , extrusion , polyethylene , chemical engineering , polymer , engineering
Abstract Properties of recycled Poly(ethylene terephthalate) were greatly improved. Recycled PET was blended with LLDPE‐ g ‐MA by low‐temperature solid‐state extrusion. Mechanical properties of the blends were affected obviously by the added LLDPE‐ g ‐MA. Elongation at break reaches 352.8% when the blend contains 10 wt % LLDPE‐ g ‐MA. Crystallization behavior of PET phase was affected by LLDPE‐ g ‐MA content. Crystallinity of PET decreased with the increase of LLDPE‐ g ‐MA content. FTIR testified that maleic anhydride group in LLDPE‐ g ‐MA reacted with the end hydroxyl groups of PET and PET‐ co ‐LLDPE‐ g ‐MA copolymers were in situ synthesized. SEM micrographs display that LLDPE‐ g ‐MA phase and PET phase are incompatible and the compatibility of the blends can be improved by the forming of PET‐ co ‐LLDPE‐ g ‐MA copolymer. LLDPE‐ g ‐MA content was less, the LLDPE‐ g ‐MA phase dispersed in PET matrix fine. With the increase of LLDPE‐ g ‐MA content, the morphology of dispersed LLDPE‐ g ‐MA phase changed from spherule to cigar bar, then to irregular spherule. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008