Carbon 9 (C9) resin is a major by‐product of the petrochemical industry and is rich in unsaturated hydrocarbons. By copolymerization with maleic anhydride (MAH), the product MAH‐C9 was used as a carbon foaming agent. Combining MAH‐C9 with ammonium polyphosphate (APP), which served as an acid and a gas source, an intumescent flame‐retardant system was introduced into thermoplastic polyurethane (TPU). Flammability evaluation indicated that 4.5 wt% APP and 0.5 wt% MAH‐C9 helped TPU achieve the maximal limiting oxygen index value of 25.9%, passing UL‐94 V‐0 rating. Total smoke release was decreased from 1,884.4 m²/m² for neat TPU to 833.0 m²/m² and char formation was promoted. The mechanical loss brought by 5 wt% APP was a little recovered by 4.5 wt% APP/0.5 wt% MAH‐C9. POLYM. ENG. SCI., 60:1029–1034, 2020. © 2020 Society of Plastics Engineers

中文翻译：

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新型炼油渣源在阻燃热塑性聚氨酯中的应用

碳9（C9）树脂是石化行业的主要副产品，并且富含不饱和烃。通过与马来酸酐（MAH）共聚，产品MAH-C9被用作碳发泡剂。将MAH-C9与用作酸和气源的聚磷酸铵（APP）结合使用，将膨胀型阻燃体系引入热塑性聚氨酯（TPU）中。可燃性评估表明，4.5 wt％的APP和0.5 wt％的MAH-C9帮助TPU达到25.9％的最大极限氧指数值，并通过了UL-94 V-0等级。总烟雾释放从1,884.4米降低² /米²为整齐TPU到833.0米² /米²并促进了炭的形成。5 wt％APP带来的机械损耗被4.5 wt％APP / 0.5 wt％MAH-C9所弥补。POLYM。ENG。SCI。，60：1029-1034，2020.©2020塑料工程师协会