Synthesis of a high-performance citric acid-based polyester elastomer by a hot-pressing technique. (8th September 2017)

• Record Type: Journal Article
• Authors: Chon, Young Jin; Koo, Jun Mo; Park, Yeon Ju; Hwang, Sung Yeon; Jung, Young Mee; Im, Seung Soon
• Is Part Of: Polymer. Volume 125(2017)
• Page Start: 283
• Page End: 291
• Publication Date: 2017-09-08
• Subjects: High-performance biobased elastomer -- Hot-pressing crosslinking -- Two-dimensional correlation spectroscopy (2D-COS); Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2017.08.013
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: The high-performance bio-based elastomer, poly (1, 4-cyclohexanedimethanol succinate- co -citrate) (PCSC), was successfully synthesized through the combination of melt polymerization and hot pressing. Owing to the structural characteristics of citric acid (CA), an effective process of thermal- and pressure-integrated crosslinking was possible, revealing CA to be a progressive tetra-functional monomer. In the composition of PCSC, there can be four types of ester bonds amongst monomers, of which CA was used in three. Specifically, the stepwise hot-pressing method allowed β-carboxylic acid and hydroxyl group of CA to remain within the synthesized elastomer to enhance its crosslinking density via esterification. As a result, the synthesized PCSC possessed a wide range of mechanical properties along with good thermal resistance. The resulting characteristics were demonstrated by fourier-transform infrared spectroscopy (FT-IR), two-dimensional correlation spectroscopy (2D-COS), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and tensile and swelling tests. PCSC is a sustainable and versatile material that can be utilized in the field of engineering. Graphical abstract: Highlights: The synthesis and characterization of citric acid based high-performance bio-based elastomer is proposed. Insight of β-carboxylic acid of citric acid is revealed through 2D correlation IR spectroscopy. Hot-pressing have induced solid-state cross-linking by activating β-carboxylic acid and improved mechanical properties.