Titre :

Influence of two kinds of low dimensional nano-sized silicate clay on the flame retardancy of polypropylene

Auteur(s) :

Tang, Wufei [Auteur]
Hunan University of Science and Engineering [Yongzhou] [HUSE]
Qin, Zuodong [Auteur]
Hunan University of Science and Engineering [Yongzhou] [HUSE]
Liu, Fang [Auteur]
Hunan University of Science and Engineering [Yongzhou] [HUSE]
Gong, Shaofeng [Auteur]
Hunan University of Science and Engineering [Yongzhou] [HUSE]
Peng, Cun [Auteur]
Hunan University of Science and Engineering [Yongzhou] [HUSE]
Gu, Xiaoyu [Auteur]
Beijing University of Chemical Technology [BUCT]
Zhang, Sheng [Auteur]
Beijing University of Chemical Technology [BUCT]
Wang, Xuan [Auteur]
Beijing University of Chemical Technology [BUCT]
Jin, Xiaodong [Auteur]
Beijing University of Chemical Technology [BUCT]
Bourbigot, Serge [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207

Titre de la revue :

Materials Chemistry and Physics

Numéro :

256

Pagination :

123743

Éditeur :

Elsevier BV

Date de publication :

2020-12

ISSN :

0254-0584

Discipline(s) HAL :

Chimie/Matériaux
Chimie/Polymères

Résumé en anglais : [en]

Nano-rolled and nano-sheeted silicates were fabricated from nature kaolinite (Kaol). And their structure was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron ...
Lire la suite >Nano-rolled and nano-sheeted silicates were fabricated from nature kaolinite (Kaol). And their structure was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM) and so on. The two nano-sized silicates acted as synergists to enhance fire retardant performance of polypropylene (PP) with intumescent flame-retardants (IFR) together. The limited oxygen index (LOI) of PP is only 18%, incorporation of 25 wt% IFR lifted the LOI to 31.1%, further increase to 34.5 and 35.5% by 1.5 wt% substitution of nano-rolled Kaol (N-Kaol) or exfoliated Kaol (E-Kaol) with same amount of IFR, respectively. Moreover, each modified Kaol can effectively control melt dripping to help PP reach UL-94 V0 grade. In cone test, the resultes showed that the peak heat release rate (pHRR) values of PP/IFR/N-Kaol (269 kW/m2) and PP/IFR/E-Kaol (319 kW/m2) composites were reduced by 38.6 and 27.2% compared to that of PP/ IFR (438 kW/m2), respectively; the smoke release was similar to the heat release. Continue increased char percentage documented the promotion on charring from E-Kaol and N-Kaol. The PP/IFR/N-Kaol exhibited the best char strength. Morphology observation on macro/micro-structure of char and real-time FTIR demonstrated that N-Kaol can be beneficial to forming homogenous and compact intumescent char layer through “double effect” of barrier and pillar-like support during burning, especially after 340 s, compared with the PP/IFRLire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2020-09-13T12:53:56Z
2020-09-14T14:13:49Z