含磷木质素基成炭剂的合成及在阻燃聚丙烯中的应用  

Synthesis of Lignin-Based Charring Agent Containing Phosphorus and Its Application in Flame Retardant Polypropylene

作　　者：王楠 宋艳 李锦春 单雪影 杨荣 吴建明 Nan Wang;Yah Song;Jinchun Li;Xueying Shan;Rong Yang;Jianming Wu(School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China;School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China;Changshu Sanheng Material Limited Liability Company, Changshu 226500, China)

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]常州大学环境与安全工程学院,江苏常州213164 [3]常熟三恒建材有限责任公司,江苏常熟226500

出　　处：《高分子材料科学与工程》2018年第4期7-13,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金面上项目(51473024);江苏省高校自然科学研究面上项目(16KJD430001)

摘　　要：以二苯氧基磷酰氯、木质素为原料,一步法合成含磷木质素基成炭剂(Lig-P),利用双辊密炼机制备了系列含LigP、聚磷酸铵、季戊四醇的膨胀阻燃聚丙烯(Lig-P-IFR/PP)。利用傅里叶变换红外光谱、光电子能谱、热失重分别对Lig-P的结构与热分解性能进行表征,结果表明,Lig-P在空气中的初始分解温度从214℃提高至226℃,且在500℃时残留量由2%增至35%,呈现出良好的热稳定性和成炭能力。锥形量热测试结果表明,Lig-P-IFR/PP的热释放速率峰值与总释热量均大幅降低;残炭的数码照片、扫描电镜及拉曼光谱分析表明,Lig-P-IFR/PP的炭层更为完整,石墨化程度也更高。此外,Lig-P-IFR/PP的LOI和UL-94分别达到31%和V-0级,拉伸强度也明显提高,达到22.5 MPa。Using diphenyl ehlorophosphate and lignin as raw material, lignin-based charring agent with phosphorus （Lig-P） was synthesized by one-step method, and a series of intumescent flame retardant polypropylene with Lig-P, ammonium polyphosphate and pentaerythritol were prepared by double roller mixer. FT-IR, XPS and TGA were used to characterize the structure and thermal degradation property of Lig-P, and the analysis results suggest that the initial degradation temperature of Lig-P rises from 214 ℃to 226 ℃, and its residue at 500℃ increases from 2% to 35 % in air atmosphere, showing that Lig-P has good thermal stability and charring ability. Cone calorimeter test results confirm the significant decrease of peak heat release rate and total heat release of Lig-P-IFR/PP. Furthermore, the analysis results of residual char after cone calorimeter test by digital photograph, SEM and LRS reveal that Lig-P-IFR/PP forms continuous char layer with higher graphitization degree. Moreover, the LOI of Lig- P-IFR/PP reaches 31% as well as its passing UL-94 V-0 rating, and its tensile strength is significantly higher than that of Lig-IFR/PP, and reaches 22.5 MPa.

关 键 词：木质素 二苯氧基磷酰氯 成炭剂 聚丙烯 阻燃 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]