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A new synthesized of cobalt ricinoleic linoleate (11(-9Z, 12Z-octadeca-9, 12-dihydroxy)-10, 13-dihydroxyactadecaneate) cinnamic dextrose (cobalt RLCD) additives and it has been incorporated into the blend of linear low density polyethylene/low density polyethylene (LLDPE/LDPE) blend was mixed to compound by using Haaky extrusion. The blend is 50:50 was mixed in various formulations of the additives such as 1, 3, and 5 wt%. The LLDPE/LDPE with additives has been evaluated first by photodegradation under specified hours followed by biodegradation studies at the end of 90 days. The photodegradation followed by biodegradation studies was monitored by changes in the structural, mechanical, morphological, thermal properties, number and weight average molecular weight (Mn and Mw), polydispersity index (PI), melt flow index, density, burst strength, static and kinetic coefficient, oxygen permeability test, and contact angle measurement. Toxicity analysis of one of the thermophilic bacteria was identified by 16S rRNA sequencing, and the percentage of biodegradation is 26 % at the end of 90 days. © 2015, Springer-Verlag Berlin Heidelberg.


Santhoskumar A.U.,Central Institute of Plastic Engineering and Technology CIPET | Palanivelu K.,Central Institute of Plastic Engineering and Technology CIPET
International Journal of Polymeric Materials and Polymeric Biomaterials | Year: 2012

A new additive, Cobalt (Co)12-hydroxyl oleate, was successfully synthesized and its performance on the photodegradability of polypropylene (PP) film was evaluated by observing the disparity in the structural characteristics, surface morphology, mechanical, flow rate, molecular weight measurement, thermal gravimetric analysis, and differential scanning colorimetry upon degradation. PP films blended with different compositions (1, 2, and 3wt %) of Co 12 hydroxyl oleate were prepared by melt blending. The photodegraded film was subjected to biodegradation in the presence of the microbes such as asspergillusniger and pencilliumfunculosum isolated from a dump. © 2012 Taylor and Francis Group, LLC.


Nayak S.K.,Central Institute of Plastic Engineering and Technology CIPET | Mohanty S.,Central Institute of Plastic Engineering and Technology CIPET
Materials Science and Engineering A | Year: 2010

PTT/m-LLDPE blends and its nanocomposites were prepared using melt blending technique in a batch mixer. Organically modified nanoclays have been used as nanoscale reinforcement to prepare blend nanocomposites. Mechanical tests revealed optimum performance characteristics at PTT/m-LLDPE ratio of 70:30. Further, incorporation of nanoclays showed higher tensile strength and modulus in the blend nanocomposites as compared to optimized blend. The nanocomposites formation has been established through X-ray diffraction and transmission electron microscopy. The thermal measurements have been carried out using DSC and TGA. DSC thermograms revealed a maximum increase in the crystallization temperature in the presence of clays in the blend system containing Cloisite 30B. TGA thermograms indicated that the thermal stability of the blend increases with the incorporation of nanoclays. DMA measurements reveal that the Cloisite 30B nanocomposite has maximum modulus as compared to other nanocomposites. © 2009 Elsevier B.V. All rights reserved.


Unnikrishnan L.,Central Institute of Plastic Engineering and Technology CIPET | Mohanty S.,Central Institute of Plastic Engineering and Technology CIPET | Nayak S.K.,Central Institute of Plastic Engineering and Technology CIPET
High Performance Polymers | Year: 2013

The feasibility of sulfonated poly(ether ether ketone) (SPEEK) membranes reinforced with unmodified silica (SiO2) and modified silica (SiO2-SO3H) nanoparticles as proton exchange membranes (PEMs) was investigated here. The sulfonated membranes were characterized for degree of sulfonation, thermal stability, as well as water/methanol uptake properties. The incorporation of SiO2 increased the hydrophilic behavior thus allowing more water retention, which facilitated an easy pathway for proton transfer. However, a reduction in proton conductivity was observed. The strong -SO3H/-SO3H interaction between SPEEK chains and SiO2-SO3H led to ionic cross-linking in the membrane structure, which compensated for this decrement in proton conductivity. The fuel cell performance study revealed the potential of SPEEK/SiO2-SO3H nanocomposite membrane to act as an efficient PEM for fuel cell application. © The Author(s) 2013.


Unnikrishnan L.,Central Institute of Plastic Engineering and Technology CIPET | Mohanty S.,Central Institute of Plastic Engineering and Technology CIPET | Nayak S.K.,Central Institute of Plastic Engineering and Technology CIPET
High Performance Polymers | Year: 2014

A candid approach to analyze the prospects of organic-inorganic nanocomposites as polyelectrolytes has been presented in this communication. Structurally modified aromatic sulfone polymer, polysulfone, was successfully prepared through modification with trimethyl silyl chlorosulfonate, which was confirmed from Fourier transform infrared spectrographs. Different classes of nanofillers like layered silicates and inorganic oxides were reinforced in the modified macromolecular system using solvent casting technique. A comparative study was performed to evaluate the effectiveness of filled polyelectrolyte membranes in a direct methanol fuel cell operated at 60°C with 1.0 M methanol feed. Atomic force micrographs revealed the phase morphology, responsible for this behaviour. The variation in ion transfer behavior as a function of structural modification and filler composition was also conducted. Furthermore, supportive information for these characterizations were derived from morphological (x-ray diffractometry), thermal (thermogravimetric analysis), and liquid uptake studies. © The Author(s) 2014.

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