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首页> 外文期刊>Journal of Applied Polymer Science >Novel Phosphorus-Containing Dicyclopentadiene-Modified Phenolic Resins for Flame-Retardancy Applications
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Novel Phosphorus-Containing Dicyclopentadiene-Modified Phenolic Resins for Flame-Retardancy Applications

机译：用于阻燃应用的新型含磷双环戊二烯改性酚醛树脂

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摘要

2-[4-(2-hydroxyphenyl)tricyclo[5.2.1.02.6]dec-8-yl]pheno1 (HPTCDP) were prepared from dicyclopentadiene (DCPD) and phenol via Friedel-Crafts alkylation. DCPD-containing phenolic resin (DPR) was also synthesized by incorporating the DCPD-containing monomer HPTCDP with formaldehyde. DPR was further modified by grafting the phosphate group. The phosphorylation was confirmed by a Fourier trans- form infrared, 31p-NMR spectroscopy, and an element analysis. The phosphorus con- tent in the DPR could be successfully tailored to give values of 3.46 to 7.79 wt % by varying the feeding ratios of the phosphorus group. The thermal stabilities of the phosphorus-containing polymers were identified by differential scanning calorimeter and thermogravimetric analysis. The glass transition temperature values were de- creased as the content of phosphorus increased. High char yield 39-47 wt % in thermogravimetric analysis evaluation and limiting oxygen index values of 27 to 34 were found for all the phosphorylated phenolic resins. Such properties make these polymers highly promising for flame-retardant applications.
机译：由二环戊二烯（DCPD）和苯酚经Friedel-Crafts烷基化反应制得2- [4-（2-羟基苯基）三环[5.2.1.02.6] dec-8-基] pheno1（HPTCDP）。还通过将含DCPD的单体HPTCDP与甲醛混合来合成含DCPD的酚醛树脂（DPR）。通过接枝磷酸基进一步修饰了DPR。磷酸化通过傅里叶变换红外光谱，31p-NMR光谱和元素分析得到证实。通过改变磷基团的进料比例，可以成功地调整DPR中的磷含量，使其值为3.46至7.79 wt％。通过差示扫描量热仪和热重分析确定了含磷聚合物的热稳定性。随着磷含量的增加，玻璃化转变温度值降低。对于所有磷酸化的酚醛树脂，在热重分析评估中发现高的焦炭收率39-47 wt％，极限氧指数值为27至34。这样的性能使这些聚合物在阻燃应用中非常有前途。

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