- 【SCI2区通讯作者宋晓锋】A green COPD flame retardant for improving poly(l-lactic acid)
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- 所属单位：化学工程学院
- 发表刊物：Polymer Degradation and Stability
- 项目来源：其他课题
- 摘要：A green flame retardant COPD is synthesized by using chitosan oligosacc- haride (COS), p- hydroxybenzaldehyde and 9,10-dihydro-9-oxa-10-phospho-10-oxide (DOPO) as raw materials according to two-step reaction. The synthesized product is confirmed with FTIR, UV and NMR. When the COPD is inserted into poly(l-lactic acid) (PLLA) via solution blending, the flame retardation of PLLA is improved. As the blend ratio of COPD/PLLA is 20/80, the limit oxygen index (LOI) and UL-94 vertical burning grade 25% and V-1, respectively. The heat release rate (HRR), total heat release (THR), and average effective heat re- lease (av-EHR) decrease in conical calorimetry. The composite also exhibits good carbon forming capacity. The flame retardation mainly originates from cooperation of condensation phase with gas phase process. Since the poor miscibility limit the dispersibility of COPD in PLLA matrix, the flame resistance and me- chanical performance of composite are to compromised. The flame retardation for PLLA is anticipated due to green raw material is used and alternative process such as melt blending and adding compatibility can be adopted.
- 合写作者：沈月石,宋晓峰
- 第一作者：宋晓峰
- 论文类型：期刊论文
- 卷号：195
- 页面范围：1
- 是否译文：否
- 发表时间：2022-01-01
