- Dynamic Numerical Simulation of Detonation Wave of Perforating Bullet and Research of Its Measuring Method
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- 所属单位：化学工程学院
- 发表刊物：Polymers for Advanced Techologies
- 项目来源：其他课题
- 摘要：A novel polyurethane containing phosphorus and nitrogen (PU) was synthesized and characterized with 1H-NMR, FTIR, and GPC. It was served as flame retardant to blend with poly(L-lactide) (PLLA) through solution casting technique. PU particle dispersed in PLLA substrate irregularly and improved the crystallinity of PLLA. The initial decomposition temperature of PLLA composite was significantly lower, but char residue increased. Flame retardancy and mechanical properties of PU/PLLA blends were evaluated. When the blend ratio of PU/PLLA was 10 wt%, LOI was 26.8%, and UL94 test reached V-2 grade. The inflaming retarding mechanism was outlined. The tensile strength of PLLA blend was 42.8 MPa, while its elongation at break was only 2%. By adjusting PU and adding compatilizer, the balance between flame retardancy and good mechanical properties of PLLA would be controlled.
- 合写作者：孙琦浩,宋晓峰
- 第一作者：宋晓峰
- 论文类型：期刊论文
- 卷号：33
- 页面范围：1
- 是否译文：否
- 发表时间：2022-01-01
