Yang Xin, Li Dexing, Song Chenggang, Shao Peiyuan, Wang Shiming, Wang Ziqing, Lv Yin, Wei Zhong
School of Chemistry and Chemical Engineering, Shihezi University Shihezi 832003 China
Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University Shihezi 832003 China.
RSC Adv. 2020 Feb 11;10(11):6414-6422. doi: 10.1039/d0ra00120a. eCollection 2020 Feb 7.
Synthesizing hydroxy-functional linear copolymers with high molecular weights ( ) 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 mim]TFN/BF/PF, = 2, 4, 6, 8, or 10) on and Den% of copolymers P(OA-GA) (1,8-octanediol adipate (O-A)/glycerol adipate (G-A)). The of P(OA-GA) reached up to 53 937 g mol 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 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.
尽管功能共聚物领域已取得很大进展，但合成具有高分子量（ ）和低支化度（Den%）的羟基官能线性共聚物仍然具有挑战性。在此，我们研究了聚合方法（一步法或两步法）和溶剂（有机溶剂：二苯醚或离子液体：[C mim]TFN/BF/PF， = 2、4、6、8或10）对共聚物P(OA-GA)（己二酸1,8-辛二醇酯（O-A）/己二酸甘油酯（G-A））的 和Den%的影响。在二苯醚中采用两步法时，P(OA-GA)的 高达53937 g mol，甘油的Den%可控制在30%以内。通过接触角、差示扫描量热法（DSC）和 生物降解研究了这些共聚物的物理性能。随着聚酯中甘油含量的增加，亲水性和降解性能均增强。该体系不仅有助于合成具有高分子量和低支化度的功能聚酯，还拓展了使用生物基单体合成功能聚合物 的可能性。
