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Helen Mariani
Inorganic and Physical Chemistry Research Division, Faculty of Mathematic and Natural Sciences, Bandung Institute of Technology
Mathematics

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Synthesis of Copolymers by Ring-Opening Copolymerization of δ-Valerolactone and 2,2-Dimethyl-1,3-Propandiol Monomers and Their Characterization I Made Arcana; Bunbun Bundjali; M Hasan; Helen Mariani; Shinta Dewi Anggraini
Jurnal Matematika & Sains Vol 13, No 1 (2008)
Publisher : Institut Teknologi Bandung

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Abstract

Copolymers of δ-valerolactone and 2,2-dimethyl-1,3-propandiol monomers P(VL-co-DP) as raw materials in synthesisof poly(urethane-ester) were prepared by a ring-opening polymerization of 2,2-dimethyl-1,3-propandiol and δ-valerolactone monomers in various composition using 1-hydroxy-3-chloro-tetraisobuthyldistanoxane as a catalyst.Characterizations of polymers were carried out by analysis of functional groups, microstructure, viscosity, hydroxylnumber, and also thermal properties of copolymers. The copolymers of 2,2-dimethyl-1,3-propandiol and δ-valerolactonemonomers have a triblock chain structure, that is P(VL-block-DP-block-VL) with various chain lengths, which dependon VL/DP ratio used in copolymerization. The increase of δ-valerolactone composition used in polymerization leads toan increase of molecular weight and melting point as well as a decrease of hydroxyl number of copolymers.
Co-Authors Bunbun Bundjali I Made Arcana M Hasan Shinta Dewi Anggraini