Radical grafting of polar monomers onto polypropylene by reactive extrusion

Sadik, Tarik; Massardier, V.; Becquart, Frédéric; Taha, Mohamed

doi:10.1002/app.38942

Cited by 16 publications

(17 citation statements)

References 87 publications

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“…25 The other compatibilizer was EVOH. The first compatibilizer is based on PP containing polar functions, namely PP-g-(maleic anhydride) (PP-g-MAH), PP-g-(itaconic acid) (PP-g-IAC), PP-g-(2-hydroxyethyl methacrylate) (PP-g-HEMA), and PP-g-(3-allyloxy-1,2-propanediol) (PP-g-AP).…”

Section: Pp/phbv Blends Compatibilizationmentioning

confidence: 99%

Polyolefins/Poly(3‐hydroxybutyrate‐co‐hydroxyvalerate) blends compatibilization: Morphology, rheological, and mechanical properties

Sadik¹,

Massardier²,

Becquart³

et al. 2012

J of Applied Polymer Sci

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Polypropylene/poly(3-hydroxybutyrate-co-hydroxyvalerate) blend (PHBV) and polyethylene/PHBV blend were prepared by twin screw extruder using preformed copolymer (EVOH-g-PHBV) as compatibilizer or with functional polyolefins that can react in situ with the PHBV phase to form POs-g-PHBV. Scanning electron microscopy shows that by using either EVOH-g-PHBV preformed copolymer or formed copolymers in situ both emulsify the phase interface and reduce the interfacial tension, which result in an enhancement on the mechanical properties of compatibilized blends. Enhancement is more or less pronounced depending on the used PO matrix.

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Section: Pp/phbv Blends Compatibilizationmentioning

confidence: 99%

Polyolefins/Poly(3‐hydroxybutyrate‐co‐hydroxyvalerate) blends compatibilization: Morphology, rheological, and mechanical properties

Sadik¹,

Massardier²,

Becquart³

et al. 2012

J of Applied Polymer Sci

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“…However, the procedure requires to be carried out above the PP melting temperature. It suffers from several disadvantages such as PP β-chain scission, high energy consumption, and low grafting efficiency [6,8,[12][13][14][15]. The solution grafting usually requires a large amount of suitable solvent for the PP to dissolve.…”

Section: Introductionmentioning

confidence: 99%

“…However, the weak molecular polarity and poor hydrophilicity of PP cause its fibers to poorly adsorb polar molecules and metal ions in water [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Preparation of polypropylene chelating fibers by quenching pretreatment and suspension grafting and their Pb2+ adsorption ability

Zhou

Yao

et al. 2014

Fibers Polym

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To prepare polypropylene (PP) melt-blown fibers with Pb 2 + adsorption ability in water, high-crystalline PP was first pretreated by quenching and then grafted with acrylic acid (AA) by the suspension-grafting method to prepare PP grafted with AA (PP-g-AA). Finally, the chelating fiber, PP-g-AA-DETA, was prepared by the amidation of PP-g-AA fiber, obtained by melt-blown spinning, with diethylenetriamine (DETA). In the quenching pretreatment, the effects of solvent amount on the crystallinity and specific surface area of PP were investigated. The main factors of suspension grafting affecting the PP-g-AA graft rate were investigated, and the melt flow rate (MFR) and water contact angle (WCA) of PP-g-AA were measured. The maximum Pb 2 + adsorption ability of the chelating fiber was determined. The results indicate that the quenching pretreatment increased the size of PP amorphous area and formed pores on the particle surface. The specific surface area of PP and its crystallinity increased simultaneously with increasing solvent amount. The graft rate of PP-g-AA first increased with increasing solvent amount and then deceased. The MFR decreased rapidly after the graft rate reached 13 %, and the WCA dropped from 102 o to 50 o . The adsorption behavior of the chelating fiber matched the Langmuir adsorption isotherm model and showed good selective Pb 2 + adsorption ability with Mg 2 +as competing ion. The maximum adsorption capacities of PP-g-AA and PP-g-AA-DETA fiber calculated by the Langmuir equation were 12.2 and 25.7 mg/g respectively.

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“…The key to enhance the grafting ratio or to reduce the degradation of PP is to stabilize the macroradicals formed through hydrogen abstraction and reducing sublimation of MAH at the reaction temperature. Polyfunctional acrylate (PFA) has a higher reactivity with PP macroradicals than MAH and can form stabilized macroradicals, thus reducing the β‐scission of macroradicals . The presence of thiurams or C 60 could prolong the lifetime of PP macroradicals and reduce degradation of PP .…”

Section: Introductionmentioning

confidence: 99%

The effect of epoxy and tetramethyl thiuram disulfide on melt‐grafting of maleic anhydride onto polypropylene by reactive extrusion

Lou¹,

Luo

Yang

2016

J of Applied Polymer Sci

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In this report, melt grafting of maleic anhydride (MAH) and epoxy resin onto polypropylene (PP) by peroxide-initiated reactive extrusion has been investigated. As evidenced by Fourier transform infrared spectroscopy, both MAH and epoxy resin were successfully grafted onto PP through the reactions of MAH with PP and epoxy resin with MAH. It was found that tetramethyl thiuram disulfide could promote the grafting of MAH and inhibit the degradation of PP, as revealed by chemical titration and melt flow experiments, through prolonging the lifetime of the macroradical; meanwhile, epoxy resin could reduce the sublimation of MAH and the maximum grafting degree of MAH. Furthermore, the introduction of grafted products was found to enhance the mechanical properties of PP/glass fiber composites, and this influence was very significant at high grafting degrees with a high content of epoxy resin, which could be interpreted in terms of improved compatibility and adhesion at the interface.

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Radical grafting of polar monomers onto polypropylene by reactive extrusion

Cited by 16 publications

References 87 publications

Polyolefins/Poly(3‐hydroxybutyrate‐co‐hydroxyvalerate) blends compatibilization: Morphology, rheological, and mechanical properties

Polyolefins/Poly(3‐hydroxybutyrate‐co‐hydroxyvalerate) blends compatibilization: Morphology, rheological, and mechanical properties

Preparation of polypropylene chelating fibers by quenching pretreatment and suspension grafting and their Pb2+ adsorption ability

The effect of epoxy and tetramethyl thiuram disulfide on melt‐grafting of maleic anhydride onto polypropylene by reactive extrusion

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