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Compatibilization effect of graft copolymer on immiscible polymer blends. II. LLDPE/PS/LLDPE‐ g ‐PS systems
Author(s) -
Feng Hanqiao,
Tian Jun,
Ye Chaohui
Publication year - 1996
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/(sici)1097-4628(19960926)61:13<2265::aid-app4>3.0.co;2-a
Subject(s) - linear low density polyethylene , materials science , compatibilization , copolymer , polymer blend , crystallization , polymer chemistry , polystyrene , polymer , composite material , chemical engineering , engineering
The compatibilizing effect of graft copolymer, linear low density polyethylene‐ g ‐polystyrene (LLDPE‐ g ‐PS), on immiscible LLDPE/PS blends has been studied by means of 13 C CPMAS NMR and DSC techniques. The results indicate that LLDPE‐ g ‐PS is an effective compatibilizer for LLDPE/PS blends, and the compatibilizing effect of LLDPE‐ g ‐PS on LLDPE/PS blends depends on the PS grafting yield and molecular structure of the compatibilizers and also on the composition of the blends. It was found that LLDPE‐ g ‐PS chains connect two immiscible components, LLDPE and PS, through solubilization of chemically identical segments of LLDPE‐ g ‐PS into the noncrystalline region of the LLDPE and PS domain, respectively. Mean while, LLDPE‐ g ‐PS chains connect the crystalline region of LLDPE by isomorphism, resulting in an obvious change in the crystallization behavior of LLDPE. © 1996 John Wiley & Sons, Inc.