Surface of poly(vinyl chloride) (PVC) thin films was coated using DOPO‐based polyamide (DBPA) coating and DBPA/Mg(OH)₂ nanocomposites (DBPN) coating by dip‐coating process. For this purpose, a new DOPO‐based dicarboxylic acid (DBDA) was synthesized and used for preparation of DBPA and organically surface modification of Mg(OH)₂ nanoparticles. The effects of DBPA and DBPN coatings on the morphology, thermal stability, combustion, and mechanical properties of PVC were investigated. The uniform dispersion of Mg(OH)₂ nanoparticles (nano‐MDH) and organically coating manner on the surface of the PVC films were confirmed by ATR‐IR spectroscopy, X‐ray diffraction (XRD), field emission scanning electron microscopy (FE‐SEM), energy dispersive X‐ray, and elemental mapping. From thermal gravimetry analysis (TGA) results, the 10 mass% loss temperature (T₁₀) increased from 268°C to 272°C in PVC coated with DBPA‐containing 10 mass% of modified Mg(OH)₂ (MMH). Also the char residue, first and second mass loss temperatures of all PVC coated were increased compared with the neat PVC film. According to microscale combustion calorimetry (MCC) results, the peak of heat release rate (pHHR) and total heat release (THR) were decreased from 128 ± 2 to 69 W/g and 12 ± 1 to 4 ± 2 KJ/g for PVC film coated with DBPA‐containing 10 mass% of MMH, compared with the neat PVC. From tensile test results, tensile strength was increased from 31.78 ± 0.8 to 39.64 ± 0.9 MPa for PVC coated with polyamide‐containing 5 mass% of MMH compared with the neat PVC.

中文翻译：

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聚氯乙烯薄膜表面含磷的聚酰胺Mg（OH）2纳米复合涂层：热稳定性，可燃性和机械性能的研究

聚氯乙烯（PVC）薄膜的表面通过浸涂工艺使用基于DOPO的聚酰胺（DBPA）涂层和DBPA / Mg（OH）₂纳米复合材料（DBPN）涂层进行涂覆。为此，合成了一种新的基于DOPO的二元羧酸（DBDA），用于制备DBPA和对Mg（OH）₂纳米粒子进行有机表面改性。研究了DBPA和DBPN涂层对PVC的形貌，热稳定性，燃烧和机械性能的影响。Mg（OH）₂的均匀分散通过ATR-IR光谱，X射线衍射（XRD），场发射扫描电子显微镜（FE-SEM），能量色散X射线，和元素映射。根据热重量分析（TGA）结果，在涂有DBPA的10％改性Mg（OH）₂涂层的PVC中，10质量％的损失温度（T ₁₀）从268°C增加到272°C（MMH）。与纯PVC膜相比，所有涂覆的PVC的残炭，第一和第二质量损失温度也增加了。根据微型燃烧量热法（MCC）的结果，PVC的放热速率（pHHR）和总放热（THR）峰值分别从128±2降低至69 W / g和12±1至4±2 KJ / g与纯PVC相比，涂有DBPA的MMH含量为10质量％的薄膜。从拉伸试验结果来看，与纯净的PVC相比，涂有含5质量％MMH的聚酰胺的PVC的拉伸强度从31.78±0.8 MPa增加到39.64±0.9 MPa。