Thermal degradation studies in poly(vinyl chloride)/poly(methyl methacrylate) blends

Ahmad, Zahoor; Al‐Awadi, Nouria A.; Al‐Sagheer, Fakhreia

doi:10.1016/j.polymdegradstab.2007.11.019

Cited by 61 publications

(38 citation statements)

References 36 publications

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“…This observation supports the mechanism proposed in Scheme 2 where the reaction of the radical produced in PMMA degradation combine with the depropagation PVC chain thus stabilizing it [14] .…”

Section: Aouachria K Et Al -The Effect Of Di-(-2-ethyl Hexyl) Phthsupporting

confidence: 89%

The effect of di-(-2-ethyl hexyl) phthalate (Dehp) as plasticizer on the thermal and mechanical properties of pvc/pmma blends

et al. 2014

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Plasticizers play a key role in the formulation of polymers and in determining their physical properties and processability. This study examines the effect of di(2-ethyl hexyl)phthalate (DEHP) as plasticizer on the thermal and mechanical properties of PVC/PMMA blends. For that purpose, blends of variable composition, from 0 to 100 wt%, were prepared in the presence (15, 30 and 50 wt %) and in the absence of di(2-ethyl hexyl)phthalate. The thermal degradation of the blends was investigated by thermogravimetric analysis (TGA) in an atmosphere of synthetic air in the temperature range of 50-550°C. The variation of the mechanical properties, such as tensile behavior, hardness and impact resistance, were investigated for all blend compositions. The effect of the plasticizer on the same properties was considered. The results obtained show that a range of properties can be generated according to the blend compositions. Therefore, the addition of PMMA to the blends stabilized PVC, for the initial thermal degradation, and the addition of the plasticizer caused a decrease of stress at break and Young modulus.

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Section: Aouachria K Et Al -The Effect Of Di-(-2-ethyl Hexyl) Phthsupporting

confidence: 89%

The effect of di-(-2-ethyl hexyl) phthalate (Dehp) as plasticizer on the thermal and mechanical properties of pvc/pmma blends

et al. 2014

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“…It is reported that pristine PMMA is degraded by end-chain scission, which is followed by random scission giving monomers as products. 38,39 Therefore, the (80/20) PPS/EGMA-g-PMMA rapidly lost weight above 350 1C although the (80/20) PPS/EMA-GMA was thermally stable up to about 400 1C. Table 3 summarizes the results of thermal decomposition for various blends, in which the onset temperature of decomposition observed at 5 wt% loss (defined as the decomposition temperature in this paper) and the residual remaining weight after a specimen was heated up to 500 1C are shown.…”

Section: Resultsmentioning

confidence: 99%

High performance reactive blends composed of poly(p-phenylene sulfide) and ethylene copolymers

Oyama

Matsushita

Furuta

2011

Polym J

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Poly(p-phenylene sulfide) (PPS) is a high performance polymer that has superior chemical resistance and heat stability, but its brittleness is a serious drawback for applications. The objective of this work is to improve the physical properties of PPS by incorporating a small amount of either poly(ethylene-ran-methylacrylate-ran-glycidyl methacrylate) (EMA-GMA) or poly(ethyleneran-glycidyl methacrylate)-graft-poly(methyl methacrylate) (EGMA-g-PMMA) by melt mixing under a high shear rate. It was demonstrated that the chemical reaction between PPS and EMA-GMA (or EGMA-g-PMMA) proceeded efficiently at the interface and that the domains of EMA-GMA (or EGMA-g-PMMA) were finely dispersed in the PSS matrix with size of ca 0.1-0.3 lm. The resultant copolymers formed at the interface contributed to a decrease in the interfacial tension and an increase in the interfacial adhesion so that the obtained PPS/EMA-GMA blends (or PPS/EGMA-g-PMMA blends) showed excellent mechanical properties, at the same time retaining high thermal stability. Polymer Journal ( , good electrical and electronic properties, good mold precision, and high stiffness and modulus (tensile modulus¼2600-3900 MPa). 1 The semi-crystalline PPS has a T g of 88-93 1C, T m of 280-285 1C and an equilibrium melting point of its orthorhombic crystals at 303-350 1C. 1-3 Furthermore, PPS shows extraordinary flame retardance, having a limited oxygen index of 44%, which belongs to the highest group among polymeric materials together with poly(vinyl chloride) and polyimide. 4 So taking advantage of these unique properties, PPS has been applied as an alternative material for metals and thermoset polymers; for example, automobile parts and electrical and electronics parts. 1 However, its low toughness and high brittleness, which originate from its rigid structure, are serious drawbacks, preventing further applications.Thus, in order to improve the properties of PPS, blending of PPS has been intensively studied, and can be categorized into three groups. The first group of PPS blends are formed with other high performance super-engineering plastics, such as polysulfone, 5 poly(ether sulfone) (PES) 6,7 and liquid crystalline polymers (LCPs), 8-10 which have thermal stability over 150 1C for long durations. It is reported that PPS blends having an amorphous polysulfone matrix (p50 wt% of PPS) show good tensile properties, but that blends having a PPS matrix (450 wt% of PPS) become brittle. 5 It was found that PPS and PES are partially miscible, in which PES is also an amorphous polymer having excellent mechanical properties. 6 Although mechanical proper-

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“…Other pyrolysis studies are available on plastics (polycarbonate: PC, polyvinyl chloride: PVC, polyvinyl acetate: PVA,…) for recycling purposes [52,53]. The data are more limited than those for PE or PMMA.…”

Section: Composition Of the Gaseous Pyrolysis Products: Difference Bementioning

confidence: 99%

Literature survey for a first choice of a fuel-oxidiser couple for hybrid propulsion based on kinetic justifications

Gascoin

Gillard

Mangeot

et al. 2012

Journal of Analytical and Applied Pyrolysis

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Thermal degradation studies in poly(vinyl chloride)/poly(methyl methacrylate) blends

Cited by 61 publications

References 36 publications

The effect of di-(-2-ethyl hexyl) phthalate (Dehp) as plasticizer on the thermal and mechanical properties of pvc/pmma blends

The effect of di-(-2-ethyl hexyl) phthalate (Dehp) as plasticizer on the thermal and mechanical properties of pvc/pmma blends

High performance reactive blends composed of poly(p-phenylene sulfide) and ethylene copolymers

Literature survey for a first choice of a fuel-oxidiser couple for hybrid propulsion based on kinetic justifications

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