- The improvement of flame retardancy and compatibility of PBAT/PLLA via a hybrid polyurethane
- 点击次数：
- 影响因子：8.2
- DOI码：10.1016/j.ijbimac.2024.133057
- 所属单位：化学工程学院（碳纤维学院）
- 教研室：制药工程系
- 发表刊物：International Journal of Biological Macromolecules
- 刊物所在地：美国
- 项目来源：省科厅项目
- 关键字：PU，PBAT/PLLA，Flame retardation，Mechanics，Hydrophobicity
- 摘要：Poly (butylene adipate-co-terephthalate)/poly (L-lactic acid) (PBAT/PLLA) is one of the most important biodegradable polymer combinations; however, they are flammable with heavy melt dripping and incompatible. To achieve the objective of flame retardation and compatibility, a hybrid polyurethane (PU) with multiple flame retardation elements is synthesized via a new ring-opening polymerization (ROP) method and integrated into PBAT/PLLA film. The PU not only dissolves in different organic solvents at mild temperature but also improves the compatibility of PBAT/PLLA. As PU with respect to PBAT/PLLA is 20 wt%, the limiting oxygen index (LOI) and UL-94 reach 25.5 % and V-0 rating, respectively. In cone calorimeter test, the peak heat release rate (pHRR) of PU/PBAT/PLLA is ahead of PBAT/PLLA, and the total heat release (THR) decreases to 25.85 MJ/m2. The fire safety is achieved successfully. The initial pyrolysis of PU promotes the formation of a seed carbon layer; it continuously breaks down into a series of phosphorus‑oxygen radicals and generates different inert gases, while the pyrolytic solid products accelerate the carbonization to form the carbon/silicon composite layer. Then the polymeric combustion is braked completely. Besides, the PU can also tune the mechanical properties of PBAT/ PLLA film and enhance its hydrophobicity. This work opens a new window for developing multifunctional flame retardant and paves the way for the richening engineering application of PBAT/PLLA.
- 合写作者：杨洁
- 第一作者：宋晓峰（教师）
- 论文类型：期刊论文
- 学科门类：工学
- 卷号：273
- 页面范围：133057
- 是否译文：否
- 发表时间：2024-06-10
- 收录刊物：SCI
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