ABSTRACT Phosphorus (P)-containing monomer (P-monomer) was firstly prepared by condensation reaction between 2-hydroxyethyl methacrylate and phosphorus pentoxide (P2O5) and then used to prepare P-containing poly-styrene-acrylate (P-PSA) emulsion by semi-continuous emulsion polymerization. The components of the prepared P-monomer were characterized by potentiometric titration method. The chemical composition of the P-PSA co-polymer was studied by Fourier-transform infrared spectra. The storage stability properties of P-PSA emulsion were tested by Ca2+, centrifugal and mechanical stability tests. The thermal stability and flame retardancy of the P-PSA co-polymer were studied by thermogravimetric analysis, limiting oxygen index and UL-94 method. The results show that stable P-PSA emulsions can be successfully prepared, and the latex particles present a spherical structure. When the P-monomer content is 30 wt%, the P-PSA co-polymer can pass the UL-94 test (V0 level) and the char yield is 54 wt% at 700°C. Scanning electron microscopy results indicate that incorporation of the P-monomer shows a condensed-phase flame-retardant effect. This study provides useful suggestions for the application of the flame-retardant P-PSA emulsion in the coating industry.

中文翻译：

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含磷聚苯乙烯-丙烯酸酯乳液的制备、表征及阻燃性

摘要 含磷 (P) 单体 (P-monomer) 先由甲基丙烯酸 2-羟乙酯与五氧化二磷 (P2O5) 缩合反应制备，然后用于制备含磷聚苯乙烯丙烯酸酯 (P-PSA) 乳液。半连续乳液聚合。采用电位滴定法对制备的P-单体的组分进行表征。通过傅里叶变换红外光谱研究了 P-PSA 共聚物的化学成分。P-PSA乳液的储存稳定性通过Ca2+、离心和机械稳定性试验进行测试。通过热重分析、极限氧指数和UL-94法研究了P-PSA共聚物的热稳定性和阻燃性。结果表明可以成功制备稳定的P-PSA乳液，胶乳颗粒呈球形结构。当P-单体含量为30wt%时，P-PSA共聚物可以通过UL-94测试（V0级），700℃下的焦炭率为54wt%。扫描电子显微镜结果表明，P-单体的掺入显示出凝聚相阻燃效果。该研究为阻燃P-PSA乳液在涂料行业的应用提供了有益的建议。