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《工程塑料应用》 2024年第01期
DOI:10.3969/j.issn.1001-3539.2024.01.021
蒙脱土改性酚醛树脂微球制备及其协效阻燃聚丙烯
张永盛1,姜立聪1,李纯志2,龙义强3,肖乐勤1,周伟良1
1.南京理工大学化学与化工学院,南京 210094; 2.泸州北方化学工业有限公司,四川泸州 646005;  3.四川临港五洲工程设计有限公司,四川泸州 646000 
Preparation of phenolic resin microspheres modified by montmorillonite and its synergistic flame retardant in polypropylene composites
ZHANG Yongsheng1, JIANG Licong1, LI Chunzhi2, LONG Yiqiang3, XIAO Leqin1, ZHOU Weiliang1
1.School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China,; 2.Luzhou North Chemical IndustriesCo., Ltd.,Luzhou 646005,China; 3.Sichuan Lingang Wuzhou Engineering Design Co., Ltd., Luzhou 646000,China 
摘要:为了提升聚丙烯(PP)的阻燃性,以苯酚、甲醛、蒙脱土(MMT)、4-羟基苯磺酸为主要原料,采用悬浮缩聚法制备 MMT 改性酚醛树脂微球(MPF)。 通过傅里叶红外光谱 、热重分析 、扫描电子显微镜、激光粒度仪等对MPF 进行表征,研究 MMT 对酚醛树脂微球的微观形貌以及热稳定性的影响。测试结果表明,成功制备了 MPF,其粒径均匀分布在 1~20 μm,相比于酚醛树脂微球 ,拥有良好的热稳定性 ,最大失重率温度为 542 ℃,800 ℃ 下残炭率为59.3%。 将MPF 引入 PP,采用熔融共混法制备了 PP/膨胀阻燃剂/MPF 复合材料,利用垂直燃烧(UL94)、极限氧指数(LOI)、力学性能测试探究 MPF 的用量对复合材料性能的影响。研究发现,MPF 由于良好的成炭性和基体相容性,使PP复合材料的阻燃性能和力学性能同时提高。当 MPF添加量为2% 时,复合材料的LOI值为 29.3%,并且通过 UL94 V-0 测试 ,拉伸强度为23.6 MPa,断裂伸长率为25.2%。MPF 燃烧时生成碳微球,调控了膨胀炭层,形成了连续且致密的炭层,可隔绝氧气与热量,从而提升了复合材料的阻燃性。 
Abstract:In order to improve flame retardancy of polypropylene (PP), montmorillonite modified phenolic resin microspheres (MPF) were prepared by suspension polymerization with phenol, formaldehyde, montmorillonite(MMT) and 4-hydroxybenzenesul‐ fonic acid. Fourier infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and laser particle size analyzer were used to characterize MPF, and the effects of MMT on the microstructure and thermal stability of phenolic resin microspheres were investigated. The test results show that MPF has been successfully prepared, and its particle size is uniformly distributed in the range of 1-20 μm. Compared with phenolic resin microspheres, it has excellent thermal stability, the maximum weight loss tempera‐ ture is 542 ℃, and the carbon residue at 800 ℃ is 59.3wt%. PP/IFR/MPF composites were prepared by melt blending method. Due to excellent the carbonization and matrix compatibility, the flame retardancy and mechanical properties of PP composites are improved. When MPF content is 2wt%, the limit oxygen index(LOI) of PP/IFR/2MPF is 29.3% and the UL94 test reach V-0. Its tensile strength and elongation at break are 23.6 MPa and 25.2%, respectively. When MPF is burned, carbon microspheres are gener‐ ated, which modified the intumescent char morphology well and formed a continuous and dense carbon layer. The carbon layer insu‐ late oxygen and heat, thereby increase the flame retardancy of the composite. 
关键词:蒙脱土;酚醛树脂微球;膨胀阻燃;协效阻燃;力学性能 
Keywords:montmorillonite; phenolic resin microspheres; intumescent flame retardant; synergistic flame retardancy; mechanical property 
基金:中国国防预研基金项目(61407200106) 
本文引用格式:
张永盛,姜立聪,李纯志,等.蒙脱土改性酚醛树脂微球制备及其协效阻燃聚丙烯[J].工程塑料应用,2024,52(1):132-137.
ZHANG Yongsheng,JIANG Licong,LI Chunzhi,et al. Preparation of phenolic resin microspheres modified by montmorillonite and itssynergistic flame retardant in polypropylene composites[J]. Engineering Plastics Application,2024,52(1):132-137. 

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