Crystallization kinetics, morphology, and hydrolytic degradation of novel biobased poly(butylene succinate-co-decamethylene succinate) copolyesters
Crystallization kinetics, morphology, and hydrolytic degradation of novel biobased poly(butylene succinate-co-decamethylene succinate) copolyesters
复制标题
新型生物基聚（丁二酸丁二醇酯-十亚甲基丁二酸酯）共聚酯的结晶动力学、形态和水解降解
DOI：
10.1016/j.polymdegradstab.2017.01.020
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发表时间：
2017-03-01
影响因子：
5.9
通讯作者：
Qiu, Zhaobin
中科院分区：
文献类型：
--
作者：
Dai, Xun;Qiu, Zhaobin
在之前的工作中，我们合成了三种具有不同十亚甲基琥珀酸酯（DS）组成的新型可生物降解聚（丁二酸丁二醇酯-共-十亚甲基琥珀酸酯）（PBDS）共聚酯，并研究了它们的基本热行为、晶体结构和机械性能（Polym. Degrad. Stab. 134 (2016) 305-310）。在这项工作中，进一步研究了这些 PBDS 共聚酯的等温熔融结晶动力学、球晶形态和生长速率以及水解降解，并与其均聚物聚丁二酸丁二醇酯 (PBS) 进行了比较。随着DS组成和结晶温度的增加，PBDS的总体等温熔融结晶速率降低；然而，PBDS和PBS的结晶机制保持不变。在很宽的结晶温度范围内研究了 PBDS 和 PBS 的球晶形态和生长速率。提高结晶温度和 DS 组成会降低 PBDS 球晶的生长速率。 PBDS 和 PBS 均表现出从体系 II 到体系 III 的结晶转变；此外，随着 DS 组成的增加，结晶态转变温度转向较低的温度。随着 DS 组成的增加，PBDS 共聚酯的水解降解率逐渐降低。扫描电子显微镜研究证明了PBDS和PBS水解降解的表面侵蚀机制。 (C) 2017 Elsevier Ltd. 保留所有权利。
In previous work, we synthesized three novel biodegradable poly(butylene succinate-co-decamethylene succinate) (PBDS) copolyesters with different decamethylene succinate (DS) compositions and studied their basic thermal behaviors, crystal structure, and mechanical properties (Polym. Degrad. Stab. 134 (2016) 305-310). In this work, the isothermal melt crystallization kinetics, spherulitic morphology and growth rates, and hydrolytic degradation of these PBDS copolyesters were further investigated and compared with those of their homopolymer poly(butylene succinate) (PBS). With increasing DS composition and crystallization temperature, the overall isothermal melt crystallization rates of PBDS decreased; however, the crystallization mechanism of PBDS and PBS remained unchanged. Spherulitic morphology and growth rates of PBDS and PBS were investigated in a wide range of crystallization temperatures. Increasing crystallization temperature and DS composition decreased growth rates of PBDS spherulites. Both PBDS and PBS exhibited a crystallization transition from regime II to regime III; moreover, the crystallization regime transition temperature shifted to lower temperature with increasing DS composition. The hydrolytic degradation rates of PBDS copolyesters gradually decreased with increasing DS composition. Scanning electron microscopy study demonstrated the surface erosion mechanism of the hydrolytic degradation of PBDS and PBS. (C) 2017 Elsevier Ltd. All rights reserved.