Oxidation of Polypropylene Homopolymer in the Molten State in Presence of Air

Abdouss, Majid; Sharifi-Sanjani, Naser; Bataille, P.

doi:10.1081/ma-100101612

Cited by 13 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The oxidation of PP was realized according to the method described by Abdouss and Sharifi-Sanjani. 17 According to this method, first PP and dodecanol-1 were mixed in an internal mixer (Brabender, Duisburg, Germany). Dried, filtered air was then put in contact with the molten mass at a flow rate of 1 L/min.…”

Section: Methodsmentioning

confidence: 99%

Effects of coupling agents on thermal behavior and mechanical properties of wood flour/polypropylene composites

Ndiaye

Tidjani

2012

Journal of Composite Materials

View full text Add to dashboard Cite

The efficiency of two coupling agents in wood-polymer composites was investigated in this study. Thermal behavior of neat polypropylene, wood flour/polypropylene composite, maleated anhydride polypropylene-reinforced wood-polymer composite, and oxidized polypropylene-reinforced wood-polymer composite was investigated by means of differential scanning calorimetry and scanning electron microscopy in order to obtain information on the dispersion of the wood flour in the polymeric matrix, on the crystallization kinetics of polypropylene, and the macrostructure of its composites. The results confirm the expected nucleant effect of wood with and without the coupling agents used. The wide angle X-ray diffraction patterns indicated enhanced compatibility between polypropylene and wood with the addition of coupling agent. As a coupling agent, maleated anhydride polypropylene had a better performance in wood-polymer composites than polypropylene oxide and neat polypropylene because of its stronger interfacial bonding. Coupling agents help overcome the polarity disparity increase. All the results showed that with maleated anhydride polypropylene, oxidized polypropylene or without any coupling agent, wood flour acted as nucleating agent and increased the crystallization rate of polypropylene. For the composites, wood with maleated anhydride polypropylene was a more effective nucleating agent for polypropylene than wood with oxidized polypropylene. The mechanical properties were evaluated and the samples with coupling agent showed superior results like tensile and flexural properties.

show abstract

Section: Methodsmentioning

confidence: 99%

Effects of coupling agents on thermal behavior and mechanical properties of wood flour/polypropylene composites

Ndiaye

Tidjani

2012

Journal of Composite Materials

View full text Add to dashboard Cite

show abstract

“…Therefore, in order to modify polypropylene to make it dyeable from aqueous dyebaths, a considerable research in recent years had been undertaken. Improving the dyeability of polypropylene fibres by means of chemical and physical modification methods inclusive of surface chemical reactions and functionalization, copolymerization and graft polymerizations, plasma and gamma radiation treatments, and blending of PP with polar polymers, metal compounds, inorganic nanoparticles, particularly, nanoclays, dendrimers and hyperbranched polymers, and many other additives has been widely investigated [ 5 – 13 ]. Considering economic, feasibility, and environmental aspects, it seems that melt blending with different kinds of polymeric additives such as polystyrene, polyamides, and polyesters, prior to spinning, could be an efficient process for the dyeability modification of PP fibers [ 14 – 16 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Dyeability of Polypropylene Fibers by Melt Blending with Polyethylene Terephthalate

Mirjalili

Moradian

Ameri

2013

The Scientific World Journal

View full text Add to dashboard Cite

Attempts were made to modify polypropylene fibers by melt blending with polyethylene terephthalate in order to enhance the dyeability of the resultant fiber. Five blends of polypropylene/polyethylene terephthalate/compatibilizer were prepared and subsequently spun into fibers. Three disperse dyes were used to dye such modified fibers at boiling and 130°C. The dyeing performance of the blend fibers, as well as the morphological, chemical, thermal, and mechanical properties, of the corresponding blends was characterized by means of spectrophotometry, polarized optical microscopy, scanning electron microscopy (SEM), FT-IR spectroscopy, differential scanning calorimetry (DSC), and tensile testing.

show abstract

“…These two peaks did not exist in the original PP, and all of the other peaks were similarly repeated. The absorbance at 1700–1780 cm −1 was related to the stretching mode of ketone, aldehyde, and anhydride carbonyl groups, and the peak at 3457 cm −1 was attributed to the stretching mode of OH groups in the alcohols 16. So, we concluded that the oxidation reaction proceeded through the formation of carbonyl and also alcohol functional groups.…”

Section: Resultsmentioning

confidence: 73%

“…The oxidation of PP was performed according the method described by Abdouss and Sharifi‐Sanjani 16. According to this method, first PP and dodecanol‐1 were mixed in an internal mixer (Brabender, Duisburg, Germany).…”

Section: Methodsmentioning

confidence: 99%

Effect of oxidized polypropylene as a new compatibilizer on the water absorption and mechanical properties of wood flour–polypropylene composites

Najafi

Bahra

Abdouss

2010

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

The effect of oxidized polypropylene (OPP) as new compatibilizer on the water absorption and mechanical properties of wood flour-polypropylene (PP) composites were studied and compared with maleic anhydride grafted polypropylene (MAPP). The oxidation of PP was performed in the molten state in the presence of air. Wood flour, PP, and the compatibilizers (OPP and MAPP) were mixed in an internal mixer at temperature of 190 C. The amorphous composites removed from the mixer were then pressed into plates that had a nominal thickness of 2 mm and nominal dimensions of 15 Â 15 cm 2 with a laboratory hydraulic hot press at 190 C. Physical and mechanical tests showed that the wood flour-PP composites with OPP exhibited higher flexural and impact properties but lower water absorption than MAPP. All of the composites with 2% compatibilizers (OPP and MAPP) gave higher flexural and impact properties and lower water absorption compared to those with 4% compatibilizers.

show abstract

Oxidation of Polypropylene Homopolymer in the Molten State in Presence of Air

Cited by 13 publications

References 30 publications

Effects of coupling agents on thermal behavior and mechanical properties of wood flour/polypropylene composites

Effects of coupling agents on thermal behavior and mechanical properties of wood flour/polypropylene composites

Enhancing the Dyeability of Polypropylene Fibers by Melt Blending with Polyethylene Terephthalate

Effect of oxidized polypropylene as a new compatibilizer on the water absorption and mechanical properties of wood flour–polypropylene composites

Contact Info

Product

Resources

About