Novel Bio-based Immiscible Blends of Poly(Butylene Succinate)/Poly(Ethylene Brassylate): Effect of PEB Loading on Their Rheological, Morphological, Thermal and Mechanical Properties

IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Journal of Polymers and the Environment Pub Date : 2024-09-19 DOI:10.1007/s10924-024-03408-0
Wendy Sartillo-Bernal, Roberto Yáñez-Macías, Ricardo López-González, Jesús Francisco Lara-Sánchez, Javier Gudiño-Rivera, Heidi Andrea Fonseca-Florido
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Abstract

Poly(butylene succinate) (PBS)/poly(ethylene brassylate) (PEB) biodegradable polyester blends were prepared at different PEB contents (5 to 30 wt%) to study the influence of the addition of PEB on the rheological behavior, morphology, thermal and mechanical properties of the blends. A gradual decrease in the shear viscosities and a greater shear thinning behavior were observed with increasing PEB content due to its low molecular weight, which acted as a lubricant or plasticizer, favoring the disentanglement of PBS chains. The blends with higher PEB content (25 and 30 wt%) had higher activation energy values and were more sensitive to temperature variations. The morphology showed good dispersion of PEB in the PBS matrix. Still, increased PEB content led to larger droplets, indicating immiscibility and poor adhesion between phases. PEB influenced both nucleation density and spherulite size of PBS/PEB blends, denoted by an increasing degree of crystallinity, a shift to low crystallization temperatures, and an improvement in the decomposition temperature according to their thermal properties. Low PEB contents (5 and 10%) increased PBS toughness due to the higher crystalline fraction and smaller crystal size of these blends.

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聚丁二酸丁二醇酯/聚丁二酸乙二醇酯的新型生物基不熔混合物:PEB 负载对其流变学、形态学、热学和力学性能的影响
制备了不同 PEB 含量(5-30 wt%)的聚(丁二酸丁二醇酯)(PBS)/聚(乙烯黄铜酸酯)(PEB)生物可降解聚酯共混物,以研究 PEB 的添加对共混物流变行为、形态、热性能和机械性能的影响。随着 PEB 含量的增加,剪切粘度逐渐降低,剪切稀化行为加剧,这是由于 PEB 的低分子量起到了润滑剂或增塑剂的作用,有利于 PBS 链的解缠。PEB 含量较高(25 和 30 wt%)的混合物具有较高的活化能值,对温度变化更为敏感。从形态上看,PEB 在 PBS 基体中的分散性良好。然而,PEB 含量的增加会导致液滴变大,表明相间不相溶和粘附性差。PEB 既影响 PBS/PEB 混合物的成核密度,也影响其球泡大小,表现为结晶度增加、向低结晶温度转变,以及根据其热学特性提高分解温度。低 PEB 含量(5% 和 10%)可提高 PBS 的韧性,这是因为这些混合物的结晶部分更高,晶体尺寸更小。
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来源期刊
Journal of Polymers and the Environment
Journal of Polymers and the Environment 工程技术-高分子科学
CiteScore
9.50
自引率
7.50%
发文量
297
审稿时长
9 months
期刊介绍: The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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