Flame-retarded polyolefin systems of controlled interphase

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The principle of multilayer interphases was proposed earlier for modifying the mechanical properties and UV stability of various multicomponent polymer systems. This paper focuses on the applicability of this principle for improving the performance of intumescent flame-retardant systems using melamine-treated ammonium polyphosphate, silicone modified polyol + ammonium polyphosphate, and silicone modified nanoparticles in polypropylene. The structure-property relationship of the formed systems was studied. A melamine layer of 1.45 nm thickness was formed around ammonium polyphosphate in order to improve the hygrothermal stability, but this layer was not shear-resistant enough. An interphase formed using a special silicone additive is more stable and acts with the intumescent flame-retardant system synergistically. The advantageous interfacial structure is quite complex in this case: polyphosphate particles are surrounded with a macro-molecular layer formed from polyol, silicone, and reactive surfactant in order to ensure good stability, efficiency and compatibility. AFM, XPS and a Cone Calorimeter were used for determining the structure and flame-retardancy of these systems. Nanocomposites combined with silicone-containing intumescent system were developed in order to avoid dipping at ignition in the vertical position. SAXS and μ-TA methods were used for determining the structure of this material.

Original languageEnglish
Pages (from-to)1103-1111
Number of pages9
JournalPolymers for Advanced Technologies
Volume13
Issue number10-12
Publication statusPublished - Oct 2002

Fingerprint

Polyolefins
Silicones
Polyphosphates
Ammonium Compounds
Flame Retardants
Melamine
Polyols
Flame retardants
Polypropylenes
Calorimeters
Surface-Active Agents
Macros
Ignition
Cones
Nanocomposites
Polymers
Multilayers
Surface active agents
X ray photoelectron spectroscopy
PL 732

Keywords

  • Flame retardance
  • Interface layer thickness
  • Nanocomposites
  • Polysiloxanes
  • SAXS
  • XPS

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Flame-retarded polyolefin systems of controlled interphase. / Marosi, G.; Anna, P.; Márton, A.; Bertalan, G.; Bóta, A.; Tóth, A.; Mohai, M.; Rácz, I.

In: Polymers for Advanced Technologies, Vol. 13, No. 10-12, 10.2002, p. 1103-1111.

Research output: Contribution to journalArticle

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