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Analysis of low‐density polyethylene‐ g ‐poly(vinyl chloride) copolymers formed in poly(vinyl chloride)/low‐density polyethylene melt blends with gel permeation chromatography and solid‐state 13 C‐NMR
Author(s) -
Sombatsompop N.,
Sungsanit K.,
Thongpin C.
Publication year - 2004
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.20286
Subject(s) - low density polyethylene , vinyl chloride , gel permeation chromatography , polyethylene , materials science , copolymer , polymer chemistry , polyvinyl chloride , composite material , polymer
Gel permeation chromatography (GPC) and solid‐state 13 C‐NMR techniques were used to analyze the structural changes of poly(vinyl chloride) (PVC) in blends of a low‐density polyethylene (LDPE) and PVC during melt blending. The GPC results showed that the weight‐average molecular weight ( M w ) of PVC increased with LDPE content up to 13.0 wt % and then decreased at a LDPE content of 16.7 wt %, whereas the number‐average molecular weight remained unchanged for all of LDPE contents used. The 13 C‐NMR results suggest that the increase in M w was associated with the formation of a LDPE‐ g ‐PVC structure, resulting from a PVC and LDPE macroradical cross‐recombination reaction during melt blending. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 3167–3172, 2004