Poly(glycolic acid) as a promising substitution for traditional petroleum-based polymers suffers from its inherent brittleness and rapid hydrolysis. The improvement of toughness and hydrolysis resistance is usually accompanied with a sacrifice of strength and stiffness. In the present work, we propose a simple and effective strategy to address this obstacle by introducing poly (butylene adipate-co-terephthalate) (PBAT) and combining extensional stress and temperature field. The robust, ductile and durable PGA/PBAT films are fabricated via “high temperature melting-quenching-stretching-annealing” (QSA) process. Highly oriented crystallites constructed by stretching and annealing lead to the improvement of strength and stiffness. Stress-induced strengthened entanglement network contributes to stabilization of craze growth and slipping, thus leading to the ductile behavior. As the result, the QSA films exhibit 89 MPa and 131% in tensile strength and the elongation at break, which are increased by 195%, 126% respectively compared to the unstretched film. More impressively, stretching resulted in abundant rigid amorphous chains, which worked with oriented crystallites to impart enhanced heat and hydrolysis resistance for the films. This work paves an avenue toward a wider range of applications for PGA materials and might be guidance for other semi-crystalline polymer blends.

聚（乙醇酸）作为传统石油基聚合物的有希望的替代品，具有其固有的脆性和快速水解的缺点。韧性和耐水解性的提高通常伴随着强度和刚度的牺牲。在目前的工作中，我们提出了一种简单有效的策略，通过引入聚（己二酸丁二醇酯 - 共 - 对苯二甲酸酯）（PBAT）并结合拉伸应力和温度场来解决这一障碍。坚固、延展和耐用的 PGA/PBAT 薄膜是通过“高温熔融-淬火-拉伸-退火”(QSA) 工艺制造的。通过拉伸和退火构建的高度定向微晶导致强度和刚度的提高。应力诱导增强的缠结网络有助于稳定裂纹的生长和滑移，从而导致延展行为。结果，QSA 薄膜的拉伸强度和断裂伸长率分别为 89 MPa 和 131%，与未拉伸薄膜相比分别增加了 195% 和 126%。更令人印象深刻的是，拉伸导致大量刚性无定形链，它与定向微晶一起赋予薄膜增强的耐热性和耐水解性。这项工作为 PGA 材料的更广泛应用铺平了道路，并可能为其他半结晶聚合物共混物提供指导。它与定向微晶一起使用，以增强薄膜的耐热性和耐水解性。这项工作为 PGA 材料的更广泛应用铺平了道路，并可能为其他半结晶聚合物共混物提供指导。它与定向微晶一起使用，以增强薄膜的耐热性和耐水解性。这项工作为 PGA 材料的更广泛应用铺平了道路，并可能为其他半结晶聚合物共混物提供指导。