Rheological,thermal, and mechanical properties of P (3HB‐co‐4HB) and P (3HB‐co‐4HB)/EVA blends |
| |
| Authors: | Jing Guo Mengzhu Liu Yuanfa Liu Chengnv Hu Ying Xia Hong Zhang Yumei Gong |
| |
| Affiliation: | 1. School of Textile and Material Engineering, Dalian Polytechnic University, Dalian, People's Republic of China;2. Liaoning Engineering Technology Research Centre of Function Fiber and its Composites, Dalian Polytechnic University, Dalian, People's Republic of China |
| |
| Abstract: | Poly(3‐hydroxybutyrate‐co‐4‐hydroxybutyrate) P(3HB‐co‐4HB)] fiber and P(3HB‐co‐4HB)/EVA fiber were obtained by single screw extrusion machine. The rheology of P(3HB‐co‐4HB) and P(3HB‐co‐4HB)/EVA blends was characterized by capillary rheometer, and the chemical groups of the blends were characterized with Fourier transform infrared spectroscopy (FT‐IR). The crystallization behavior and thermal, mechanical and elastic properties of the fibers were measured by differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA) and single fiber strength tester, respectively. Besides, the moisture regain and drying shrinkage rates of the fibers were tested. These results showed that P(3HB‐co‐4HB)/EVA blends have better flowability, crystallinity, and thermal stability than P(3HB‐co‐4HB) fiber. The fracture strength of the P(3HB‐co‐4HB)/EVA fiber decreases with increasing the EVA content, but the elongation at break shows the contrary tendency. The rebound resilience ratio of P(3HB‐co‐4HB)/EVA fiber reaches 100%. Both moisture regain and drying shrinkage increase first and then decrease with increasing the EVA content. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 41206. |
| |
| Keywords: | composites fibers rheology thermal properties |
|
|
