摘要
对比了聚丙烯(PP)基体中,不同填料对聚磷酸铵(APP)-季戊四醇(PER)与磷酸胍(GP)-PER膨胀型阻燃(IFR)体系产生的不同影响,并以填料Si O2、Ca CO3、Sb2O3以及Al2O3为代表,进行了研究。极限氧指数(LOI)结果表明填料与APP-PER体系复配后,LOI提高,并产生协同作用,但与GP-PER体系复配后,LOI降低,产生拮抗作用。SEM-EDS结果表明,填料加入APP-PER体系后改善了炭层致密性,炭层中的填料被大量可溶性含磷降解产物(PDPs)包覆、粘结,而填料加入GP-PER体系后却富集在炭层表面,破坏炭层致密性。X射线衍射结果表明,GP-PER体系的炭层表面富集的粒子为填料本身或相应磷酸盐以及聚磷酸盐。热失重、离子色谱等测试表明,在2种IFR体系产生的炭层中,PDPs的含量和性状差异较大,应是填料对炭层产生协同或拮抗作用的关键因素之一。
Effects of various fillers on ammonium polyphosphate( APP)-pentaerythritol( PER) system and guanidine phosphate( GP)-PER system in PP matrix were compared. Effects of Si O2,Ca CO3,Sb2O3 and Al2O3fillers were further investigated. The results of limit oxygen index imply that fillers play synergetic effects on APP-PER system but play antagonistic effects on APP-PER system. The results of scanning electron microscopy-energy disperse spectroscopy( SEMEDS) tests indicate that: the compactness of char layer from PP / APP-PER-filler composites is improved,and the fillers in char layer are coated and cemented by phosphorous degradation products( PDPs); however,the situations of PP / GPPER-filler composites are on the contrary. The inorganic particles on the char layer of PP / GP-PER-filler composites are identified as virgin fillers and phosphates( or polyphosphates) by XRD tests. The content and properties of the soluble PDPs in char layer were compared and determined by TGA and ion chromatography( IC) tests. And those content and properties of PDPs could be one of key factors for synergetic or antagonistic effects of fillers.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第5期44-50,共7页
Polymer Materials Science & Engineering
基金
上海市重点学科和重点实验室项目资助(B502
08DZ2230500)
关键词
填料
膨胀型阻燃体系
聚丙烯
炭层
含磷降解产物
fillers
intumescent flame-retardant system
polypropylene
char layer
phosphorous degradation products
