Effect of acrylic polymer and nanocomposite with nano-SiO2 on thermal degradation and fire resistance of APP-DPER-MEL coating

Acrylic nanocomposite and flame retardant coatings with different acrylic polymers were prepared. The effect of molecular structure and molecular weight of acrylic resins and nanocomposite with nano-SiO2 on the interaction and char formation of ammonium polyphosphate-dipentaerythritol-melamine (APP-DPER-MEL) coating was investigated using differential thermal analysis (DTA), thermogravimetry (TG), Limiting Oxygen Index (LOI), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and fire protection test. The interaction of APP, DPER, MEL and 3F-I acrylic resin led to the formation of intumescent coherent char at 300-450 degrees C. Owing to low molecular weight and lack of benzene rings, F-963 acrylic resin decomposed at lower temperature than APP, and hence their endothermic interaction was destroyed. The well-distributed nano-SiO2 particles in acrylic nanocomposite could modify char formation and anti-oxidation of char structure at high temperature. It is noted that the fire protection properties of nanocoating with acrylic nanocomposite were better than those of flame retardant coatings with conventional acrylic resins. (c) 2006 Elsevier Ltd. All rights reserved.

[1]  E. Han,et al.  Influence of nano-LDHs on char formation and fire-resistant properties of flame-retardant coating , 2005 .

[2]  Donald R. Baer,et al.  Enhancing coating functionality using nanoscience and nanotechnology , 2003 .

[3]  Emmanuel P. Giannelis,et al.  Polymer Layered Silicate Nanocomposites , 1996 .

[4]  S. Bourbigot,et al.  Effect of fillers on fire retardancy of intumescent polypropylene blends , 2003 .

[5]  S. Duquesne,et al.  Influence of ammonium polyphosphate on the mechanism of thermal degradation of an acrylic binder resin , 2004 .

[6]  L. Hendrickson,et al.  Review of stabilization of polyolefin insulated conductors. Part I: Theory and factors affecting stability , 1995 .

[7]  James V. Beck,et al.  Estimation of Thermal Properties and Surface Heat Flux in Carbon-Carbon Composite , 1995 .

[8]  C. A. Wilkie,et al.  The thermal degradation of polyacrylonitrile , 1997 .

[9]  S. Duquesne,et al.  Effect of Bonding Resins on the Flammability Properties and Thermal Behaviour of Cotton and Cotton/PESFR Woven Fabrics , 2003 .

[10]  M. Alagar,et al.  Mechanical, thermal and morphological behavior of bismaleimide modified polyurethane‐epoxy IPN matrices , 2003 .

[11]  G. Vigier,et al.  Nanofillers in polymeric matrix : a study on silica reinforced PA6 , 2001 .

[12]  G. Marosi,et al.  Fire retardancy effect of migration in polypropylene nanocomposites induced by modified interlayer , 2003 .

[13]  M. Shimomura,et al.  Graft Polymerization of Vinyl Monomers from Inorganic Ultrafine Particles Initiated by Azo Groups Introduced onto the Surface , 1990 .

[14]  K. Friedrich,et al.  Structure–property relationships of irradiation grafted nano-inorganic particle filled polypropylene composites , 2001 .

[15]  S. Bourbigot,et al.  Charring of fire retarded ethylene vinyl acetate copolymer — magnesium hydroxide/zinc borate formulations , 2000 .

[16]  S. Duquesne,et al.  Thermoplastic resins for thin film intumescent coatings – towards a better understanding of their effect on intumescence efficiency , 2005 .

[17]  B. Qu,et al.  Intumescent char structures and flame‐retardant mechanism of expandable graphite‐based halogen‐free flame‐retardant linear low density polyethylene blends , 2003 .

[18]  S. Bourbigot,et al.  Use of Carbonizing Polymers as Additives in Intumescent Polymer Blends , 2001 .

[19]  Buddy D. Ratner,et al.  Advances in the analysis of surfaces of biomedical interest , 1995 .

[20]  I. C. Mcneill,et al.  Thermal stability and degradation mechanisms of poly(acrylic acid) and its salts: Part 1—Poly(acrylic acid) , 1990 .

[21]  W. Fan,et al.  Flammability and thermal degradation of flame retarded polypropylene composites containing melamine phosphate and pentaerythritol derivatives , 2005 .

[22]  Y. L. Tallec,et al.  New intumescent formulations of fire-retardant polypropylene : Discussion of the free radical mechanism of the formation of carbonaceous protective material during the thermo-oxidative treatment of the additives , 1996 .

[23]  Xiaowei Pei,et al.  Synthesis of well-defined, polymer-grafted silica nanoparticles via reverse ATRP , 2005 .

[24]  Junbiao Peng,et al.  Novel red-emitting fluorene-based copolymers , 2002 .

[25]  K. Friedrich,et al.  Irradiation graft polymerization on nano-inorganic particles: An effective means to design polymer-based nanocomposites , 2000 .

[26]  S. Bourbigot,et al.  Effect of fillers on the fire retardancy of intumescent polypropylene compounds , 2003 .

[27]  C. N. R. Rao,et al.  Science and technology of nanomaterials: current status and future prospects , 2001 .

[28]  Birgit Östman,et al.  Durability of fire retardant treated wood products at humid and exterior conditions review of literature , 2001 .

[29]  B. You,et al.  Preparation and characterization of acrylic latex/nano‐SiO2 composites , 2002 .

[30]  Wei Ke,et al.  Effect of nanoparticles on the improvement in fire-resistant and anti-ageing properties of flame-retardant coating , 2006 .