Compatibilization of intumescent flame retardant/polypropylene composites based on α‐methacrylic acid grafted polypropylene

Abstract

ABSTRACT:A phosphoric acid-pentaerythritol-melamine copolymer was selected as an intumescent flame retardant (IFR). The influence of ␣-methacrylic acid grafted polypropylene (PP-g-MAA) on the properties and compatibility of IFR/PP composites was studied. The results obtained from mechanical tests and scanning electron microscopy showed that PP-g-MAA was a true coupling agent for IFR/PP blends, but it did not change the necessary flame retardancy. The cocrystallization between bulk PP and PP segments of PP-g-MAA was proved by wide-angle X-ray diffraction analysis. A flow test showed that the flow behaviors of composites in the melt were those of a pseudoplastic liquid and it was very small for PP-g-MAA and affected the rheological behavior of the PP/IFR composite.

A novel charring agent containing caged bicyclic phosphate and its application in intumescent flame retardant polypropylene systems

“…In recent years, intumescent flame retardants (IFR) have attracted increasing attention in the flame retardation of materials because they produce low smoke and toxicity with no corrosive gas generation [7][8][9][10][11][12][13][14][15][16][17][18]. The IFR system is usually composed of three components: an acid source, a carbonization agent and a blowing agent [15,18].…”

A Novel Intumescent Flame‐Retardant Polyethylene System

“…These kind of flame retardant end products are devoid of corrosion production in the manufacturing procedure, and emit less smoke as compared to halogenated/metal compound systems. However, the conventional IFR additives also have some disadvantages 16–18. To achieve a certain flame retarding level, a higher loading of IFR additive is needed than that of some halogen‐containing flame retardants, at the expense of the mechanical properties of the flame‐retardant materials.…”

Thermal Degradation Behavior of Poly(propylene) with a Novel Silicon‐Containing Intumescent Flame Retardant

“…[1][2][3][4][5][6][7] They offer PP flame retardancy through modifying the decomposition mode. The generations of IFRs have the advantages of low smoke, low toxicity, low corrosion and no molten dropping during a fire.…”

“…The generations of IFRs have the advantages of low smoke, low toxicity, low corrosion and no molten dropping during a fire. [3][4][5][6][7] Generally, IFRs contain three main ingredients: acid source, carbon source and gas source. Phosphorus-containing compounds are often used as an acid source in IFRs.…”