ISSN (Print): 2373-3403

ISSN (Online): 2373-3411

Website: http://www.sciepub.com/journal/jpbpc

Editor-in-chief: Martin Alberto Masuelli

Currrent Issue: Volume 3, Number 1, 2015

Article

Uptake of Automobile Fluids by Dynamically Vulcanized Recycled Polyethylene/natural Rubber (rPE/NR) Biocomposites

1Department of Polymer and Textile Engineering, Nnamdi Azikiwe University, Awka, P. M. B. 5025, Awka, Nigeria


Journal of Polymer and Biopolymer Physics Chemistry. 2015, 3(1), 19-27
doi: 10.12691/jpbpc-3-1-4
Copyright © 2015 Science and Education Publishing

Cite this paper:
C. M. Ewulonu, I. C. Chukwujike, U. J. Timothy. Uptake of Automobile Fluids by Dynamically Vulcanized Recycled Polyethylene/natural Rubber (rPE/NR) Biocomposites. Journal of Polymer and Biopolymer Physics Chemistry. 2015; 3(1):19-27. doi: 10.12691/jpbpc-3-1-4.

Correspondence to: C.  M. Ewulonu, Department of Polymer and Textile Engineering, Nnamdi Azikiwe University, Awka, P. M. B. 5025, Awka, Nigeria. Email: cm.ewulonu@unizik.edu.ng

Abstract

This study presents long term sorption properties of automobile fluids – premium motor spirit (PMS) and automotive gas oil (AGO) in dynamically vulcanized recycled polyethylene/natural rubber (rPE/NR) thermoplastic elastomer biocomposites. The effect of oil palm empty fruit bunch (OPEFB) filler and maleic anhydride graft polyethylene (MAPE) as compartibilizer on the rPE/NR blends were also studied. The automobile fluids uptake trend was observed to reducewith OPEFB incorporation. Uptake of the automobile fluids by the biocompositesincreased rapidlywithin the first 24 hours and subsequently increased gradually within the 7 days period studied.The analysed results also showed that both the uncompartibilized and compartibilized thermoplastic elastomer biocomposites absorbed more PMS than AGO at same OPEFB loading and immersion time. Diffusion, sorption, and permeation coefficients of both PMS and AGO for the compatibilizedbiocompositesdecreased with increasing OPEFB content. The mode of transport of the automobile fluids into the filled rPE/NR blends has been found to be Fickianwhere the n values ranges from 0.1 to 0.4 for the various systems. This study also revealed greater degree of interaction between the PMS and the biocomposites than the AGO and the biocomposites.

Keywords

References

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Article

Influence of the Ionic Strength in the Intrinsic Viscosity of Xanthan Gum. An Experimental Review

1Universidad Nacional de San Luis. PROICO 2-1612. INTEQUI-CONICET, San Luis, Argentina

2Universidad Nacional de San Luis. PROIPRO 2-2414. INFAP-CONICET, San Luis, Argentina


Journal of Polymer and Biopolymer Physics Chemistry. 2015, 3(1), 12-18
doi: 10.12691/jpbpc-3-1-3
Copyright © 2015 Science and Education Publishing

Cite this paper:
Enrique D. Vega, Elena Vásquez, Jorge R. A. Diaz, Martín A. Masuelli. Influence of the Ionic Strength in the Intrinsic Viscosity of Xanthan Gum. An Experimental Review. Journal of Polymer and Biopolymer Physics Chemistry. 2015; 3(1):12-18. doi: 10.12691/jpbpc-3-1-3.

Correspondence to: Martín  A. Masuelli, Universidad Nacional de San Luis. PROIPRO 2-2414. INFAP-CONICET, San Luis, Argentina. Email: radiaz@unsl.edu.ar; masuelli@unsl.edu.ar

Abstract

This study involves the influence of ionic strength in intrinsic viscosity of xanthan gum. The best concentration of monovalent and bivalent cations chloride salts is evaluated. The salt concentration is 0.001 M for monovalent cations and 3 x 10-5 M for bivalent cations and the hydrodynamic radius is maximum for these concentrations. The minimal concentration is in the range of 0.01 to 0.1 M for different cations.

Keywords

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Article

Changes in Surface Properties and Dyeability of Polyethylene Terephthalate Fibre Pretreated with Selected Chlorinated Solvents

1Science Laboratory Technology Department, Osun State Polytechnic, P.M.B. 301, Iree, Nigeria

2Chemistry Department, Federal University of Technology, P.M.B 704, Akure, Nigeria


Journal of Polymer and Biopolymer Physics Chemistry. 2015, 3(1), 6-11
doi: 10.12691/jpbpc-3-1-2
Copyright © 2015 Science and Education Publishing

Cite this paper:
Oyeleke G.O., Popoola A.V., Adetuyi A.O.. Changes in Surface Properties and Dyeability of Polyethylene Terephthalate Fibre Pretreated with Selected Chlorinated Solvents. Journal of Polymer and Biopolymer Physics Chemistry. 2015; 3(1):6-11. doi: 10.12691/jpbpc-3-1-2.

Correspondence to: Oyeleke  G.O., Science Laboratory Technology Department, Osun State Polytechnic, P.M.B. 301, Iree, Nigeria. Email: mr.oyeleke@yahoo.com

Abstract

Scanning electron microscopy (SEM) and X- ray diffractometry (XRD) analyses has been used to investigate the structure of polyester fibre surface before and after treatment in some chlorinated solvents; perchloroethylene (PCE), trichloroethylene (TCE), 1,1- dichloroethylene (1,1-DCE) and tetrachloromethane (TCM) for different times in relaxed condition at room temperature. The results of the scanning electron micrographs did not show any observable internal damage in the fiber structure. On the surface however, several changes such as presence of micro voids, roughness and scissions of varying shapes, magnitudes and spacing density have been observed. The intensity of the diffracted peaks from the X- ray diffractographs of the treated fibre also showed a fall compared to the control one which may be accounted for in terms of the surface structural changes earlier on observed. The pretreatment of the polyester fibre with the chlorinated solvents was found to improve the dye uptake of all the treated fibres in the order of TCE > 1,1-DCE > PCE > TCM; this may be due to the large increase in the inter surface area swelling and greater segmental mobility of polymer molecules. TCE was found to be the best among the four solvents in terms of improvement in dye uptake. The improvement in the fastness properties (wash and light) of the pretreated fabrics was also observed. The chlorinated solvents used in this experiment caused structural differences on surface structures of the polyester fibres and these changes are very crucial to the behaviour of the polymer in fibre processing for other essential usage.

Keywords

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Article

Acoustical Studies of Molecular Interactions in the Solution of Anti-Malarial Drug

1Jankidevi Bajaj College of Science, Jamnalal Bajaj Marg, Civil Lines Wardha


Journal of Polymer and Biopolymer Physics Chemistry. 2015, 3(1), 1-5
doi: 10.12691/jpbpc-3-1-1
Copyright © 2015 Science and Education Publishing

Cite this paper:
Ritesh Ramdasji Naik, Sheshrao Vitthalrao Bawankar, Vilas Maruti Ghodki. Acoustical Studies of Molecular Interactions in the Solution of Anti-Malarial Drug. Journal of Polymer and Biopolymer Physics Chemistry. 2015; 3(1):1-5. doi: 10.12691/jpbpc-3-1-1.

Correspondence to: Ritesh  Ramdasji Naik, Jankidevi Bajaj College of Science, Jamnalal Bajaj Marg, Civil Lines Wardha. Email: ritunaik912@rediffmail.com

Abstract

In the present study ultrasonic velocity (U), density (ρ) and viscosity (η) have been measured at frequency 1 MHz in the binary mixtures of chloroquine phosphate with water in the concentration range (0.1 to 0.0125 %) at 303 K,308 K,313 K using multi frequency ultrasonic interferometer. The measured value of density, ultrasonic velocity, and viscosity have been used to estimate the acoustical parameters namely adiabatic compressibility (βa), relaxation time (τ), acoustic impedance (z), free length (Lf), free volume (Vf) and internal pressure (Πi), Wada’s constant (W) to investigate the nature and strength of molecular interaction in the binary mixture of chloroquine phosphate hydrochloride with water. The obtained result supports the complex formation, molecular association by intermolecular hydrogen bonding in the binary liquid mixtures.

Keywords

References

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