Inherent flame retardation of bio-based poly(lactic acid) by incorporating phosphorus linked pendent group into the backbone
Inherent flame retardation of bio-based poly(lactic acid) by incorporating phosphorus linked pendent group into the backbone
复制标题
通过将磷连接的侧基纳入主链来实现生物基聚乳酸的固有阻燃性
DOI：
10.1016/j.polymdegradstab.2011.06.012
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发表时间：
2011-09
影响因子：
5.9
通讯作者：
Wang, Yu-Zhong
中科院分区：
文献类型：
--
作者：
Yuan, Xiao-Ya;Wang, De-Yi;Chen, Li;Wang, Xiu-Li;Wang, Yu-Zhong
通过1，6-二异氰酸酯（HDI）对端羟基预聚物进行扩链，在聚乳酸（PLA）主链上引入有效的有机磷阻燃剂（FR），实现了本征阻燃聚乳酸（IFR-PLA）的分子设计。用1H-和31 P-核磁共振（NMR）和傅里叶变换红外（FTIR）光谱对IFR-PLA的结构进行了表征。将IFR-PLA与市售PLA进一步共混制备阻燃PLA共混物（PLA-FR共混物）。通过差示扫描量热法（DSC）、热重分析（TGA）、极限氧指数（LOI）和UL-94测试对IFR-PLA和PLA-FR共混物的相关性能进行了评价。热分析表明，IFR-PLA和PLA-FR共混物在400 °C以上的炭化率比纯PLA有很大提高。当引入1wt%的磷含量时，LOI值从纯PLA的19显著提高到29，并且所有IFR-PLA样品在UL-94测试中达到V-0等级。PLA-FR共混物在IFR-PLA含量为20重量%时具有25-26的LOI值和UL-94 V-2等级。所有FR PLA系统的拉伸强度均为约100 MPa。60兆帕。该方法为聚乳酸的永久阻燃提供了一条新的途径。
The molecular design for inherently flame-retardant poly(lactic acid) (IFR-PLA) was outlined and achieved by chemically incorporating an effective organophophorus-type flame retardant (FR) into the PLA backbone via the chain extension of the dihydroxyl-terminated prepolymer with 1, 6-hexamethylene diisocyanate (HDI). The structure of IFR-PLA was characterized by1H- and31P-nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy. IFR-PLA was further blended with the commercial PLA to prepare flame retardant PLA blends (PLA-FR blend). The relevant properties of IFR-PLA and PLA-FR blends were evaluated by differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), limiting oxygen index (LOI) measurements and UL-94 tests. The thermal analysis revealed that the char yield of IFR-PLA and PLA-FR blend above 400 °C was greatly enhanced compared to that of pure PLA. The LOI value was significantly improved from 19 for pure PLA to 29 when 1 wt% of phosphorus content was introduced and all IFR-PLA samples achieved V-0 rating in the UL-94 tests. PLA-FR blends had an LOI value of 25–26 and UL-94 V-2 rating at 20 wt% of IFR-PLA content. The tensile strength of all the FR PLA systems was ca. 60 MPa. The method used in this study provided a novel route to permanently flame retard PLA.
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DOI：
10.1016/b978-0-323-85772-7.00007-0
发表时间：
2021
期刊：
Processing Technology for Bio-Based Polymers
影响因子：
--
作者：
K. Zia;N. Akram;S. Tabasum;Aqdas Noreen;M. U. Akbar
通讯作者：
K. Zia;N. Akram;S. Tabasum;Aqdas Noreen;M. U. Akbar
DOI：
10.1002/pola.21072
发表时间：
2005-12
期刊：
Journal of Polymer Science Part A
影响因子：
--
作者：
Ching Hsuan Lin;S. Cai;C. Lin
通讯作者：
Ching Hsuan Lin;S. Cai;C. Lin
DOI：
10.1080/10601329608010880
发表时间：
1996-05
期刊：
Journal of Macromolecular Science, Part A
影响因子：
--
作者：
R. G. Sinclair
通讯作者：
R. G. Sinclair
影响因子：
5.9
作者：
J. Zhan;Lei Song;Shi-bin Nie;Yuan Hu
通讯作者：
J. Zhan;Lei Song;Shi-bin Nie;Yuan Hu
影响因子：
3.9
作者：
Wang, DY;Ge, XG;Zhou, Q
通讯作者：
Zhou, Q