Enhancement in Thermal Stability of Polyoxymethylene (POM)-Based Biopolymer Blend Materials

• 作者: Atsushi Sakuma Hiroyuki Hamada Jitlada Boonlertsamut Supaphorn Thumsorn Toshikazu Umemura
• 来源期刊: 材料科学与化学工程(英文)
• 学科: 化学
• 关键词: POLYOXYMETHYLENE Poly (Lactic Acid) BIOPOLYMER Injection SPEEDS
• 年，卷（期）: 2019,（7）
• 页码范围: 67-78
• 页数: 12页
• 分类号: O6

摘要

In this study, we demonstrate the enhancement in thermal stability of polyoxymethylene (POM)-based biopolymer blend materials. Polyoxymethylene (POM)/Polylactic acid (PLA) blends have been used as alternative biopolymer materials for supporting environmental problems with thermal stability feature. The effects on POM biopolymer blend materials with a controlled PLA amount in their compositions under various injection conditions, were investigated by thermogravimetric analysis, dynamic mechanical analysis, and differential scanning calorimetry. The POM/PLA biopolymer blend materials showed POM phase acted as a homogeneous nucleating site for increasing PLA crystallization, which improves storage modulus of the blend materials. The decomposition temperatures of POM/PLA biopolymer blends tend to shift around 30˚C - 50˚C lower compared to the decomposition temperatures of PLA. Thus, the decomposition temperature behavior of POM/PLA blends seems to be closer to POM. The suitable ratio in POM70/PLA30 resulted in the high strength of the blend materials. The POM/PLA biopolymer blend material was tested at various injection speeds and good miscibility was obtained at an injection speed of 100 mm/s. This enhancement of thermal stability in POM/PLA blend materials should be useful in the development of high-performance bio-based thermoplastic materials.