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Synthesis and properties of poly(butylene succinate) with N ‐hexenyl side branches
Author(s) -
Jin HyoungJoon,
Kim DuckSoo,
Kim MalNam,
Lee IckMo,
Lee HanSup,
Yoon JinSan
Publication year - 2001
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.1659
Subject(s) - branching (polymer chemistry) , differential scanning calorimetry , polymer chemistry , polyester , glass transition , polybutylene succinate , side chain , double bond , succinic acid , biodegradation , enthalpy , diol , materials science , melting temperature , chemistry , organic chemistry , polymer , composite material , physics , quantum mechanics , thermodynamics
N ‐hexenyl side branches were introduced into poly(butylene succinate) (PBS) by polymerization of succinic acid (SA) with 1,4‐butanediol (BD) in the presence of 7‐octene‐1,2‐diol (OD). Thermal properties and biodegradability of the aliphatic polyesters were investigated before and after epoxidation of the pendant double bonds. The glass‐transition temperature ( T g ) decreased with the branching density to give a minimum at 0.03 mol of branching units per mole of structural units. Thereafter, T g increased due to the in situ crosslinking of the unsaturated groups during the differential scanning calorimetry (DSC) measurements. N ‐Hexenyl side branches decreased melting temperature ( T m ) more significantly than ethyl side branches, but the effect was on par with that by n ‐octyl branches. Epoxidation of the double bonds decreased T m and melting enthalpy (Δ H m ), but increased T g of the aliphatic polyester. Biodegradability was enhanced to some extent by the presence of n ‐hexenyl side branches. However, the epoxidation of the unsaturated groups did not notably affect the biodegradability. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2219–2226, 2001