Graft copolymerization of MMA onto flax under different reaction conditions: a comparative study

Kaith, Balbir Singh; Kalia, Susheel

doi:10.3144/expresspolymlett.2008.13

Cited by 53 publications

(18 citation statements)

References 25 publications

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“…2]. Figure 3 shows the morphology of raw flax, flax-g-poly (MMA) prepared in air, under pressure and under the influence of microwave radiations [103]. A number of methods can be used for the generation of active sites on the polymeric backbone and can be described as: physical method [104][105], chemical method [106][107][108][109][110][111][112], physicomechanical method [113], radiation method [114][115][116] and enzymatic grafting [117][118].…”

Section: Graft Copolymerization Of Natural Fibersmentioning

confidence: 99%

“…Microwave radiation technique reduces the extent of physicochemical stresses to which the fibers are exposed during the conventional techniques [119]. Kaith and Kalia [103] have reported the graft copolymerization of flax fibers with vinyl monomers SCHEME 5. Peroxide treatment of cellulosic fibers [67].…”

Section: Graft Copolymerization Of Natural Fibersmentioning

confidence: 99%

“…Maximum percentage grafting (41.7%) has been observed in case of graft copolymerization performed in air at 558C followed by grafting under pressure (36.4%) at 0. [103,120].…”

Section: Graft Copolymerization Of Natural Fibersmentioning

confidence: 99%

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Pretreatments of natural fibers and their application as reinforcing material in polymer composites—A review

Kalia

Kaith

Kaur

2009

Polymer Engineering & Sci

1,249

704

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In recent years, natural fibers reinforced composites have received much attention because of their lightweight, nonabrasive, combustible, nontoxic, low cost and biodegradable properties. Among the various natural fibers; flax, bamboo, sisal, hemp, ramie, jute, and wood fibers are of particular interest. A lot of research work has been performed all over the world on the use of natural fibers as a reinforcing material for the preparation of various types of composites. However, lack of good interfacial adhesion, low melting point, and poor resistance towards moisture make the use of natural fiber reinforced composites less attractive. Pretreatments of the natural fiber can clean the fiber surface, chemically modify the surface, stop the moisture absorption process, and increase the surface roughness. Among the various pretreatment techniques, graft copolymerization and plasma treatment are the best methods for surface modification of natural fibers. Graft copolymers of natural fibers with vinyl monomers provide better adhesion between matrix and fiber. In the present article, the use of pretreated natural fibers in polymer matrix‐based composites has been reviewed. Effect of surface modification of natural fibers on the properties of fibers and fiber reinforced polymer composites has also been discussed. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers

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Section: Graft Copolymerization Of Natural Fibersmentioning

confidence: 99%

Section: Graft Copolymerization Of Natural Fibersmentioning

confidence: 99%

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Pretreatments of natural fibers and their application as reinforcing material in polymer composites—A review

Kalia

Kaith

Kaur

2009

Polymer Engineering & Sci

1,249

704

View full text Add to dashboard Cite

show abstract

“…Each spectrum was collected by cumulating 32 scans at a resolution of 8 cm -1 . Gravimetric measurements of films before and after grafting reactions were carried out to determine the grafting percentage by means of the Equation (1) [37,38]:…”

Section: Chemical Structurementioning

confidence: 99%

Poly(acrylic acid) surface grafted polypropylene films: Near surface and bulk mechanical response

Fasce¹,

Costamagna²,

Pettarín³

et al. 2008

Express Polym. Lett.

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Abstract. Radical photo-grafting polymerization constitutes a promising technique for introducing functional groups onto surfaces of polypropylene films. According to their final use, surface grafting should be done without affecting overall mechanical properties. In this work the tensile drawing, fracture and biaxial impact response of biaxially oriented polypropylene commercial films grafted with poly(acrylic acid) (PAA) were investigated in terms of film orientation and surface modification. The variations of surface roughness, elastic modulus, hardness and resistance to permanent deformation induced by the chemical treatment were assessed by depth sensing indentation. As a consequence of chemical modification the optical, transport and wettability properties of the films were successfully varied. The introduced chains generated a PAA-grafted layer, which is stiffer and harder than the neat polypropylene surface. Regardless of the surface changes, it was proven that this kind of grafting procedure does not detriment bulk mechanical properties of the PP film.

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“…The incorporation of monomer chains to the backbone of flax had impaired the crystallinity of flax fiber [23]. Therefore, grafting decreased the crystallinity of flax with reduction in its stiffness and hardness [24][25][26][27][28].…”

Section: Percentage Crystallinity and Crystallinity Index Of Graft Comentioning

confidence: 99%

Mechanical properties of flax-g-poly(methyl acrylate) reinforced phenolic composites

et al. 2008

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In order to develop composites with better mechanical properties and environmental performance, it becomes necessary to increase the hydrophobicity of the natural fibers and to improve the interface between matrix and natural fibers. Graft copolymerization of natural fibers is one of the best methods to attain these improvements. Only few workers have reported the use of graft copolymers as reinforcing material in the preparation of composites. So in the present paper, we report the preparation of graft copolymers of flax fibers with methyl acrylate (MA) using Fenton's reagent (FAS-H 2 O 2 ) as redox system. Synthesized flax-g-poly(MA) was characterized with FTIR, TGA/DTA, scanning electron microscopy (SEM), and X-ray diffraction (XRD) techniques. Composites were prepared using flax-g-poly(MA) as a reinforcement and phenolformaldehyde (PF) as the binding material. Mechanical properties of phenol-formaldehyde composites were compared and it has been found that composites reinforced with flax-g-poly(MA) showed improvement in mechanical properties. Composites reinforced with flax-g-poly(MA) showed better tensile strength (235 N) and compressive strength (814 N) in comparison to composites reinforced with original flax fiber which showed lesser tensile strength (162 N) and compressive strength (372 N). Composites reinforced with flax-g-poly(MA) shows the improved MOR, MOE, and SP.

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Graft copolymerization of MMA onto flax under different reaction conditions: a comparative study

Cited by 53 publications

References 25 publications

Pretreatments of natural fibers and their application as reinforcing material in polymer composites—A review

Pretreatments of natural fibers and their application as reinforcing material in polymer composites—A review

Poly(acrylic acid) surface grafted polypropylene films: Near surface and bulk mechanical response

Mechanical properties of flax-g-poly(methyl acrylate) reinforced phenolic composites

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