聚丙烯膨胀阻燃剂的研制:生物环氧树脂微囊化聚磷酸铵

IF 1.4 4区 工程技术 Q3 ENGINEERING, CHEMICAL Periodica Polytechnica Chemical Engineering Pub Date : 2022-01-26 DOI:10.3311/ppch.19468
Thuy Tien Nguyen Thanh, K. Decsov, K. Bocz, G. Marosi, B. Szolnoki
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引用次数: 4

摘要

聚丙烯(PP)由于缺乏羟基官能团,本身没有炭化能力,阻燃体系中需要添加较多的炭化剂。采用山梨糖醇基生物环氧树脂壳对常规阻燃剂聚磷酸铵(APP)进行微胶囊化改性,制备了具有增强PP炭化能力的膨胀型阻燃体系,并对其在PP基体中不同负荷下的阻燃效果进行了评价。与该组分的物理混合相比,APP的微胶囊化形式(MCAPP)在PP中的阻燃效率有所提高,含PP样品的LOI值提高了8-11 V/V%,并根据UL94测试达到V-0级。通过锥量热仪测试,MCAPP的燃烧强度降低(放热速率峰值降低20 ~ 35%,且随时间发生位移),炭渣量增加,根据计算得到的阻燃指数(FRI), MCAPP的防火性能达到“优”。阻燃性能的提高是由于APP芯与现成的碳化壳之间的有效相互作用,促进了炭的形成,同时提高了热保护和阻隔效率。
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Development of Intumescent Flame Retardant for Polypropylene: Bio-epoxy Resin Microencapsulated Ammonium-polyphosphate
As polypropylene (PP) has no charring ability on its own due to the lack of hydroxyl functional groups, the flame retardant system needs the addition of carbonizing agent in a relatively great amount. Ammonium-polyphosphate (APP), a conventional flame retardant additive was modified by microencapsulation with a sorbitol-based bioepoxy resin shell to create an intumescent flame retardant system with enhanced charring ability for PP. The flame retardant efficiency of the microencapsulated additive, which contains all the components needed in an effective intumescent flame retardant system, was evaluated in PP matrix at different loadings.When compared to the physical mixture of the component, the microencapsuated form of APP (MCAPP) was found to have improved flame retardant efficiency in PP. The LOI values of the MCAPP containing PP samples increased by 8–11 V/V% besides achieved V-0 classification according to the UL94 test. During cone calorimeter tests, the burning intensity was reduced (peak of heat release rate decreased by 20–35% and shifted in time), increased amount of charred residue was obtained, and based on the calculated Flame Retardancy Index (FRI) “Excellent” fire performance was achieved when MCAPP was used. The improved flame retardant performance is attributed to the effective interaction between the APP core and the readily available carbonizing shell, which promoted the formation of increased amount of char accompanied with improved heat protecting and barrier efficiency.
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来源期刊
CiteScore
3.10
自引率
7.70%
发文量
44
审稿时长
>12 weeks
期刊介绍: The main scope of the journal is to publish original research articles in the wide field of chemical engineering including environmental and bioengineering.
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