Syntheses of high molecular weight hydroxy functional copolymers by green and selective polycondensation methods. Issue 11 (11th February 2020)

• Record Type: Journal Article
• Authors: Yang, Xin; Li, Dexing; Song, Chenggang; Shao, Peiyuan; Wang, Shiming; Wang, Ziqing; Lv, Yin; Wei, Zhong
• Is Part Of: RSC advances. Volume 10:Issue 11(2020)
• Page Start: 6414
• Page End: 6422
• Publication Date: 2020-02-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra00120a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : High molecular weight hydroxy functional copolymers have been synthesized by two-step polycondensation. Abstract : Synthesizing hydroxy-functional linear copolymers with high molecular weights ( M n ) and low branching degree (Den%) remains challenging, although there has been much headway in the area of functional copolymers. Here, we studied the effect of polymerization methods (one-step or two-step) and solvents (organic solvent: diphenyl ether or ionic liquids: [C n mim]TF2 N/BF4 /PF6, n = 2, 4, 6, 8, or 10) on M n and Den% of copolymers P(OA–GA) (1, 8-octanediol adipate (O-A)/glycerol adipate (G-A)). The M n of P(OA–GA) reached up to 53 937 g mol −1 in two-step in diphenyl ether, and the Den% of glycerol can be controlled within 30%. The physical properties of these copolymers were investigated by contact angles, differential scanning calorimetry (DSC), and in vitro biodegradation. With increasing glycerol content in the polyesters, both hydrophilic properties and degradation properties increased. This system not only facilitates the synthesis of functional polyesters with high molecular weight and low branching, but also expands the possibility of using bio-based monomers to synthesize functional polymers.