101 research outputs found
Synthesis of graft copolymers of acrylamide for locust bean gum using microwave energy: swelling behavior, flocculation characteristics and acute toxicity study
Graft copolymerization of MMA onto flax under different reaction conditions: a comparative study
Cellulose-Based Bio- and Nanocomposites: A Review
Cellulose macro- and nanofibers have gained increasing attention due to the high
strength and stiffness, biodegradability and renewability, and their production
and application in development of composites. Application of cellulose
nanofibers for the development of composites is a relatively new research area.
Cellulose macro- and nanofibers can be used as reinforcement in composite
materials because of enhanced mechanical, thermal, and biodegradation properties
of composites. Cellulose fibers are hydrophilic in nature, so it becomes
necessary to increase their surface roughness for the development of composites
with enhanced properties. In the present paper, we have reviewed the surface
modification of cellulose fibers by various methods. Processing methods,
properties, and various applications of nanocellulose and cellulosic composites
are also discussed in this paper
In air synthesis of Psy-cl-poly(AAm) network and its application in water-absorption from oil-water emulsions
Microwave Enhanced Synthesis of Flax-g-poly(MMA) for Use in Phenolic Composites as Reinforcement
Graft copolymerization of methyl methacrylate (MMA) onto flax fiber under the influence of microwave radiations (MWR) was carried out. 24.64% grafting was found at 210W microwave power under optimum reaction conditions. The graft copolymers were characterized with FTIR spectroscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Graft copolymers thus prepared were used in the preparation of phenol-formaldehyde (PF) composites. Modulus of rupture (MOR), modulus of elasticity (MOE) and stress at the limit of proportionality (SP) of composites were measured and it has been found that composites reinforced with Flax-g-poly(MMA) showed better mechanical properties in comparison to composites reinforced with raw flax
Synthesis, Characterization and Mechanical Evaluation of the Phenol-Formaldehyde Composites
Phenol: formaldehyde ratio was varied in the synthesis of phenol- formaldehyde resin and used to prepare the composites. These composites were then evaluated for their mechanical strength on the basis of tensile strength, compressive strength and wear resistance. Composite with better strength was characterized by IR, SEM, XRD, TGA/DTA and further studies were carried out for its physico-chemical and mechanical properties like viscosity, modulus of rupture (MOR), modulus of elasticity (MOE) and stress at the limit of proportionality (SP) etc
Synthesis, Characterization and Evaluation of the Transformations in Hibiscus sabdariffa-graft-poly(butyl acrylate)
Different reaction parameters for the graft copolymerization of butyl acrylate onto Hibiscus sabdariffa fiber were optimized. Graft copolymers thus obtained were subjected to characterization using XRD, TGA, DTA, SEM and FTIR techniques and were evaluated for physio-chemical changes in the behavior. The percentage crystallinity and crystallinity index were found to decrease with increase in grafting while there was reduction in moisture absorption and increase in chemical, thermal resistance of the graft copolymers
Evaluation of the Morphological Transformations in Novel Graft Copolymers Obtained from Hibiscus Sabdariffa (Roselle) Stem Fibre
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