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Crystallization and photo‐curing kinetics of biodegradable poly(butylene succinate‐ co ‐butylene fumarate) short‐segmented block copolyester
Author(s) -
Naghavi Sheikholeslami Sogol,
Rafizadeh Mehdi,
Afshar Taromi Faramarz,
Shirali Hadi
Publication year - 2017
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.5264
Subject(s) - crystallinity , copolyester , crystallization , polybutylene succinate , materials science , copolymer , polymer chemistry , gel permeation chromatography , kinetics , curing (chemistry) , differential scanning calorimetry , chemical engineering , polymer , composite material , polyester , thermodynamics , physics , quantum mechanics , engineering
Short‐segmented block copolymers of poly(butylene succinate‐ co ‐butylene fumarate) were synthesized and their crystallinity and crosslinking behavior were investigated. 1 H NMR was used to characterize the microstructure and composition of the copolyesters. Molecular weight determination was performed using gel permeation chromatography. Based on the DSC results all copolyesters were crystalline and the degree of crystallinity of the copolymers did not change with butylene fumarate mole fraction due to co‐crystallization of the butylene succinate and butylene fumarate groups. Crosslinked copolyesters showed a lower crystallization rate and degree of crystallinity while the crystallization temperature shifted to higher temperatures compared with uncrosslinked copolyesters due to the formation of nucleating agents by crosslinkages. Photo‐ DSC was used to investigate the crosslinking kinetics for UV ‐initiated photo‐curing. Three kinetics parameters including the rate constant ( k ) and the orders of the initiation and propagation reactions ( m and n , respectively) were determined for the quenched and unquenched copolymers. © 2016 Society of Chemical Industry