Synthesis of Hyperbranched Polypropylene/Organoclay Nanocomposites by Metal Catalyzed Living Radical Polymerization and Solvent Blending Method

Abbasian, Mojtaba; Bonab, Solmaz Esmaeily Shoja; Shahparian, Maryam

doi:10.1080/03602559.2012.718399

Cited by 10 publications

(5 citation statements)

References 31 publications

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“…[6][7][8] Hence, to improve the interaction between polymer matrix and clay, montmorillonite is usually modified with alkyl ammonium, which makes the hydrophilic clay surface organophilic 9 . Several methods have been adopted to prepare organoclay/polyolefin nanocomposites, including in situ polymerization of propylene in the presence of layered silicates, 10,11 , solvent blending 12 and melt compounding. 1,13 Among all, melt compounding has been the most convenient process for preparation of the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanoclay on the nucleation, crystallization and melting behaviour of polypropylene

Sahoo

Mohanty

Nayak

2016

Journal of Thermoplastic Composite Materials

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Non-isothermal crystallization kinetics of virgin polypropylene (PP) and its nanocomposites have been evaluated using differential scanning calorimetric technique. The nanocomposites were prepared using melt intercalation method. It is observed that the crystallization peak temperature of nanocomposite is marginally higher than virgin PP at various cooling rates. The non-isothermal crystallization melt data were analysed using Avrami, Ozawa and Mos models. The half-time for crystallization decreased with incorporation of clay nanoparticles. The values of crystallization rate constant and cooling rate at unit crystallization time showed that the crystallization rate increased with the increasing of cooling rates for virgin PP and nanocomposite, but the crystallization rate of nanocomposite was faster than that of PP at a given cooling rate. The activation energy for non-isothermal crystallization of virgin polymer and nanocomposites based on Kissinger method has been determined to be 186 and 196 kJ mol−1, respectively. The polarized micrographs showed that the number of effective nuclei increased in the PP-clay nanocomposite, where the clay acts as a heterogeneous nucleating agent during the crystallization of the nanocomposite.

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Section: Introductionmentioning

confidence: 99%

Effect of nanoclay on the nucleation, crystallization and melting behaviour of polypropylene

Sahoo

Mohanty

Nayak

2016

Journal of Thermoplastic Composite Materials

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“…Therefore, there is a lack of control over molecular weight and polydispersity of the graft chains [18]. These problems can be circumvented through applying of living radical polymerization methods such as: atom transfer radical polymerizations (ATRP) [19][20][21], nitroxide-mediated polymerizations (NMP) [22][23][24] and reversible addition-fragmentation chain transfer polymerization (RAFT) [25][26][27]. Metalcatalyzed living-radical polymerization, generally called atom-transfer radical polymerization (ATRP), is one of the most widely used methods for controllable radical polymerization and is based on the reversible reaction of low oxidation-state metal complexes with an alkyl halide, generating radicals and the corresponding high-oxidation state metal complexes with a coordinated halide ligand (Scheme 1) [28].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Cellulose-graft-Polychloromethylstyrene-graft-Polyacrylonitrile Terpolymer/Organoclay Bionanocomposite by Metal Catalyzed Living Radical Polymerization and Solvent Blending Method

Abbasian

Pakzad

Kobra

2017

Polymer-Plastics Technology and Engineering

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A bionanocomposite of grafted cellulose and organo modified clay was synthesized through solution intercalation method. For this purpose, chloromethylstyrene was grafted onto cellulose using acryloyl chloride and the subsequent free radical polymerization.The synthesized cellulose-graft-poly chloromethylstyrene was used as an atom transfer radical polymerization macroinitiator of acrylonitrile in the presence of CuCl /2, 2'-bipyridine catalyst system, to prepare the cellulose-graft-poly chloromethyl styrenegraft-polyacrylonitrile terpolymer. For preparing the modified clay, Na-MMT was mixed with hexadecyl trimethyl ammonium chloride salt. Finally, cellulose -graft-poly chloromethylstyrene -graft -polyacrylonitrile / organoclay bionanocomposite was prepared in CCl 4 by solution intercalation method. Downloaded by [University of California Santa Barbara] at 16:41 22 June 2016 2 Graphical Abstract:

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“…More recently (2012), Bakar et al have evaluated the effect of the component mixing sequence on the properties of a ternary nano-composite, epoxy=polyurethane=MMT [21] . Several expedients can be used to improve the effect of the fillermatrix mixing: mechanical (e.g., ultra-sonication [22] ) and chemical ones (silane grafting [23] , maleic anhydride grafting [24,25] , supported tungsten catalyst [26] ).…”

Section: Introductionmentioning

confidence: 99%

The Role of Mixing Time in the Production of Nanocomposite Thermosetting Coatings

Quadrini¹,

Bellisario²,

Lucignano³

et al. 2013

Polymer-Plastics Technology and Engineering

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In this study, nanocomposite coatings have been produced by\ud mixing unsaturated polyester resin with 1 and 5 wt% of montmorillonite\ud (MMT). Nanocomposites were studied as bulk and as coatings\ud to accurately evaluate the combined effect of mixing time and\ud MMT content on final performances of the mixtures. Rheological\ud analyses, mechanical and dynamic mechanical tests, tribological\ud tests and scratch tests were performed on samples. Results show\ud the strong effect of the mixing time on the performance of MMTfilled\ud coatings: this effect is never negligible and can overcome the\ud effect of the MMT content

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Synthesis of Hyperbranched Polypropylene/Organoclay Nanocomposites by Metal Catalyzed Living Radical Polymerization and Solvent Blending Method

Cited by 10 publications

References 31 publications

Effect of nanoclay on the nucleation, crystallization and melting behaviour of polypropylene

Effect of nanoclay on the nucleation, crystallization and melting behaviour of polypropylene

Synthesis of Cellulose-graft-Polychloromethylstyrene-graft-Polyacrylonitrile Terpolymer/Organoclay Bionanocomposite by Metal Catalyzed Living Radical Polymerization and Solvent Blending Method

The Role of Mixing Time in the Production of Nanocomposite Thermosetting Coatings

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