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Effect of short chain branching on the blown film properties of linear low density polyethylene
Author(s) -
Kim YongMan,
Park JungKi
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<2315::aid-app10>3.0.co;2-3
Subject(s) - linear low density polyethylene , ethylene , polyethylene , branching (polymer chemistry) , materials science , hexene , copolymer , octene , polymer chemistry , composite material , 1 octene , drop (telecommunication) , butene , molar mass distribution , chemistry , polymer , organic chemistry , catalysis , telecommunications , computer science
Three linear low density polyethylene (LLDPE) resins of similar melt index and density were synthesized with different comonomers in the Unipol pilot‐plant scale reactor. The molecular structure, blown film morphology, and film strength properties of the resins have been comprehensively characterized. The film dart drop impact strength of the LLDPEs increases in the order of ethylene/1‐butene, ethylene/1‐octene, and ethylene/1‐hexene copolymers; whereas the Elmendorf tear strength of them increases in the order of ethylene/1‐butene, ethylene/1‐hexene, and ethylene/1‐octene copolymers. The mechanical properties seem to be highly associated with the length and distribution of short chain branches and, consequently, the lamellar thickness distribution of the resins. © 1996 John Wiley & Sons, Inc.