当前位置: X-MOL 学术Polym. Degrad. Stabil. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A novel bio-based flame retardant for polypropylene from phytic acid
Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2019-02-05 , DOI: 10.1016/j.polymdegradstab.2019.02.005
Yu-Yang Gao , Cong Deng , Yuan-Yuan Du , Sheng-Chao Huang , Yu-Zhong Wang

Phytic acid mainly exists in seeds, roots and stems of plants, which has a potential value in flame-retarding polymers due to the high content of phosphorus. In this work, a novel bio-based phytic acid salt PHYPI was prepared through a salt formation reaction between phytic acid and piperazine. The structure of the bio-based PHYPI was verified using 1H NMR spectrascoppy. When PHYPI was used to fabricate flame-retardant polypropylene (PP), it showed high efficiency in combustion tests. The limiting oxygen index (LOI) value for PP containing 18.0 wt% PHYPI is 25.0%, showing a 38.9% increase compared to 18.0% for PP containing no additive. Moreover, it passed the UL-94 V-0 rating in the vertical burning test, superior to the no rating for pure PP. Obviously, the flame-retarding efficiency of PHYPI is higher than that of typical traditional intumescent flame retardant containing ammonium polyphosphate or pentaerythritol. Cone calorimeter test revealed that the heat release and smoke production of PP were efficiently restrained by the presence of PHYPI. The peak of heat release rate (PHRR), total heat release (THR), and the peak of smoke release rate (PSPR) for PP containing 20 wt% PHYPI were decreased by 65.6%, 13.5%, and 32.8%, respectively, compared to the same values for PP alone. Fourier transform infrared spectroscopy (FTIR) was used to investigate the changes which accompanied the thermal degradation of the polymer containing PHYPI. Changes in the infrared spectra for the polymer undergoing degradation indicate that structures containing C=C and P-N-C were formed as a consequence of the presence of PHYPI. These transformations enhanced char formation to provide condensed phase protective action. At the same time, non-combustion volatile gases such as water and carbon dioxide may be released to dilute the fuel load in the gas phase. All evidences illustrate that PHYPI is an effective flame retardant for PP.



中文翻译:

一种新型的基于植酸的生物基聚丙烯阻燃剂

植酸主要存在于植物的种子,根和茎中,由于磷含量高,因此在阻燃聚合物中具有潜在价值。在这项工作中,通过植酸和哌嗪之间的盐形成反应制备了新型的基于生物的植酸盐PHYPI。使用1验证了生物基PHYPI的结构1 H NMR光谱。当PHYPI用于制造阻燃聚丙烯(PP)时,在燃烧测试中显示出很高的效率。包含18.0 wt%PHYPI的PP的极限氧指数(LOI)值为25.0%,与不包含添加剂的PP的18.0%相比,增加了38.9%。此外,它在垂直燃烧测试中通过了UL-94 V-0等级,优于纯PP的无等级。显然,PHYPI的阻燃效率要高于典型的传统传统膨胀型阻燃剂,该阻燃剂包含多磷酸铵或季戊四醇。锥形量热仪测试显示,PHYPI的存在可有效抑制PP的放热和烟雾产生。放热率(PHRR),总放热(THR)的峰值,与单独使用PP的相同值相比,含有20 wt%PHYPI的PP的烟雾释放率峰值(PSPR)分别降低了65.6%,13.5%和32.8%。傅里叶变换红外光谱(FTIR)用于研究伴随PHYPI聚合物热降解而发生的变化。经历降解的聚合物的红外光谱变化表明,由于PHYPI的存在,形成了含C = C和PNC的结构。这些转变增强了焦炭的形成,以提供凝聚相保护作用。同时,可以释放诸如水和二氧化碳之类的非燃烧挥发性气体,以稀释气相中的燃料负荷。所有证据表明PHYPI是PP的有效阻燃剂。与单独PP的相同值进行比较。傅里叶变换红外光谱(FTIR)用于研究伴随PHYPI聚合物热降解而发生的变化。经历降解的聚合物的红外光谱变化表明,由于PHYPI的存在,形成了含C = C和PNC的结构。这些转变增强了焦炭的形成,以提供凝聚相保护作用。同时,可以释放诸如水和二氧化碳之类的非燃烧挥发性气体,以稀释气相中的燃料负荷。所有证据表明PHYPI是PP的有效阻燃剂。与单独PP的相同值进行比较。傅里叶变换红外光谱(FTIR)用于研究伴随PHYPI聚合物热降解而发生的变化。经历降解的聚合物的红外光谱变化表明,由于PHYPI的存在,形成了含有C = C和PNC的结构。这些转变增强了焦炭的形成,以提供凝聚相保护作用。同时,可以释放诸如水和二氧化碳之类的非燃烧挥发性气体,以稀释气相中的燃料负荷。所有证据表明PHYPI是PP的有效阻燃剂。傅里叶变换红外光谱(FTIR)用于研究伴随PHYPI聚合物热降解而发生的变化。经历降解的聚合物的红外光谱变化表明,由于PHYPI的存在,形成了含C = C和PNC的结构。这些转变增强了焦炭的形成,以提供凝聚相保护作用。同时,可以释放诸如水和二氧化碳之类的非燃烧挥发性气体,以稀释气相中的燃料负荷。所有证据表明PHYPI是PP的有效阻燃剂。傅里叶变换红外光谱(FTIR)用于研究伴随PHYPI聚合物热降解而发生的变化。经历降解的聚合物的红外光谱变化表明,由于PHYPI的存在,形成了含有C = C和PNC的结构。这些转变增强了焦炭的形成,以提供凝聚相保护作用。同时,可以释放诸如水和二氧化碳之类的非燃烧挥发性气体,以稀释气相中的燃料负荷。所有证据表明PHYPI是PP的有效阻燃剂。这些转变增强了焦炭的形成,以提供凝聚相保护作用。同时,可以释放诸如水和二氧化碳之类的非燃烧挥发性气体,以稀释气相中的燃料负荷。所有证据表明PHYPI是PP的有效阻燃剂。这些转变增强了焦炭的形成,以提供凝聚相保护作用。同时,可以释放诸如水和二氧化碳之类的非燃烧挥发性气体,以稀释气相中的燃料负荷。所有证据表明PHYPI是PP的有效阻燃剂。

更新日期:2019-02-05
down
wechat
bug