Pa-APP/PER/α-ZrP阻燃聚丙烯酸酯乳液的制备及性能

Preparation and performance of Pa-APP/PER/α-ZrP flame retardant polyacrylate emulsion

摘要:

摘 要：以α-磷酸锆（α-ZrP）为协效剂，与哌嗪改性聚磷酸铵（Pa-APP）/季戊四醇（PER）复配构建膨胀型阻燃体系，研究了该阻燃体系对聚丙烯酸酯的阻燃效率，分析了其阻燃机制。正交试验表明：当阻燃剂总添加量为25%，Pa-APP : PER=9:2以及α-ZrP含量为2%时，阻燃改性聚丙烯酸酯的LOI值达到最大值(30.4%)，UL-94达到V-1等级，热释放峰值和总热量释放量相比纯聚丙烯酸酯分别降低了75.9%和39.4%。通过扫描电子显微镜、红外分析仪对改性聚丙烯酸酯残炭的形貌和成分进行分析，证实Pa-APP/PER/α-ZrP复合阻燃体系能够有效抑制熔滴，提高聚丙烯酸酯的残炭量和改善炭层结构，降低燃烧过程中的生烟量，显著提高改性聚丙烯酸酯的阻燃安全性能。

Abstract:

Abstract: α-zirconium phosphate (α-ZrP) as synergist was combined with piperazine-modified ammonium polyphosphate (Pa-APP)/pentaerythritol (PER) intumescent flame retardants to overcome the flammability and melt dropping issues of polyacrylate. The optimal addition ratio was explored through orthogonal experiments. The results show that Pa-APP/PER/α-ZrP has a prominent synergistic flame retardant effect with 25% total addition, Pa-APP:PER=9:2 and 2% α-ZrP, the maximal LOI of polyacrylate composite reached 30.4%, UL-94 achieved V-1, and the peak heat release rate (PHRR) and total heat release (THR) reduced by 75.9% and 39.4%, respectively. In addition, the morphology and composition of carbon residue were analyzed by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) and fourier transform infrared spectrum (FT-IR),the system improved the weight and quality of carbon layer of polyacrylate, which effectively inhibited the droplet and smoke generation, significantly improved the fire safety of polycrylate.