Degradation of polymer blends: A brief review

Abstract

The usefulness of any material, including polymer blends, depends on its degradability and durability. The blend composition can significantly affect the degradative behavior of a polymer blend and can differ from the degradation routes of the pure components since the interactions among different species in the blends during degradation, and among the degradation products, can occur. These reactions can lead either to an acceleration of the degradation rate or to a stabilizing effect in comparison with the pure components. Thus, the additive rule cannot be often applied in case of degradation of polymer blends and, therefore, it is difficult to predict the degradative behavior of a polymer blend on the base of the properties of pure components.

This review aims to report the status of the research on degradation of polymer blends focusing on thermal, thermomechanical and photo-oxidative degradation. Read more: click here

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Pinfa Newsletter Issue N°82 August 2017

Click here: Pinfa_Newsletter_Issue_no82_August-2017

 

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London Tower Fire – Plastic Polyethylene Burn Test

European Coatings Fire Forum 2017

European Coatings Fire Forum, 17-18 October 2017

Conference Programme

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Competitiveness and synergy between three flame retardants

Competitiveness and synergy between three flame retardants in poly(ethylene-co-vinyl acetate)

Abstract

This work seeks to address the effect of simultaneous use of three flame retardants, having three different modes of action, (magnesium hydroxide, expanded and expandable graphite) on the thermal degradation and flame retardancy of poly(ethylene-co-vinyl acetate). Thermal conductivity of samples was measured in order to investigate the effect of the use of expanded and expandable graphite on the time-to-ignition and the peak of heat release rate in cone calorimeter test. Thermal shielding performances of chars were studied as well. It was found that there is an optimum ratio between expanded and expandable graphite in order to control thermal conductivity and therefore fire properties. Some correlations were also found between the char thickness and the first peak of heat release rate. Read more: click here

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Fire Resistance in Plastics 2017

Fire Resistance in Plastics 2017 programme is now available!

Click here: Fire_Resistance_in_Plastics_2017

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A plant-based reactive ammonium phytate for use as a flame-retardant for cotton fabric

New research paper in Carbohydrate Polymers

Abstract

A plant-based non-formaldehyde flame retardant containing high phosphorus ammonium phytate (APA) was synthesized for cotton fabric. The char length of treated cotton sample decreased to 31 mm from the original 300 mm. The LOI value of finished cotton fabric was as high as 43.2%, and after 30 laundering cycles, it still remained 30.5%, suggesting that APA could be used as an effective semi-durable flame retardant. The TG analysis in air demonstrated that the thermal oxidation stability of treated fabric was significantly improved. Cone calorimetry results showed that the peak heat release rate and total heat release of treated sample reduced obviously comparing with that of control sample. The SEM morphologies suggested that the APA molecule penetrated into the inner space of cotton fibers. FTIR spectra implied the APA molecule grafted onto cotton fibers. Then, the effective flame retardant APA has significant potential in practical application.

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