| Affiliation: | 1. School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Beijing, 100048 People's Republic of China
Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing, 100048 People's Republic of China;2. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029 People's Republic of China;3. School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Beijing, 100048 People's Republic of China;4. Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Jiangsu, 214122, People's Republic of China |
| Abstract: | In this article, a facile and efficient isothermal crystallization induction method was proposed to fabricate microcellular poly(butylene succinate) (PBS) foams with supercritical CO2. The good regularity of PE chain segments and high reactive epoxy groups in ethylene-glycidyl methacrylate copolymer (PE-g-GMA) serving as a chain extender were employed to improve the crystallization behaviors, viscoelasticity, and foaming behaviors of PBS through chain extension reaction. The effect of PE-g-GMA content on the thermal properties, rheological performances, and cellular morphology of various PBS samples was investigated systematically. When the PE-g-GMA content switched from 7.5 to 10 wt %, an interesting transition from fine cells to microcells was observed in PBS/PE-g-GMA foams. Microcellular PBS foam modified by 10 wt % PE-g-GMA was successfully prepared at the foaming temperature of 87 °C and the induction time of 7 min, in which its cell size and cell density could reach 6.63 ± 1.93 μm and 3.75 × 109 cells cm?3, respectively. The formation of abundant but tiny spherocrystals in chain extended PBS samples made a considerable contribution for preparing microcellular PBS foams. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48850. |
