MIT-World Peace University (MIT-WPU) is a top educational institute located in Pune, India. It is recognized within&nbsp;UGC under Government of Maharashtra Act No. XXXV 2017.&nbsp;

It is part of the MIT group of institutions (established in 1983) which covers 10+ campuses across India and has more than 50,000+ students enrolled across various disciplines at a given point of time. The institute houses 15 schools ranging from Engineering &amp; Technology, Design, Pharmacy, Commerce, Governance among others. It offers undergraduate, postgraduate and PhD programs among different disciplines.&nbsp;

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MIT World Peace University

Engineering and Technology

The structure development in melt crystallized polypropylene (PP) containing different types and concentration of calcium sulphate has been studied by X-ray diffraction and optical polarizing microscopy. The commercial CaSO4 containing mostly the anhydrite form gives the α form of PP while the CaSO4 prepared by in situ method yields the β form of PP. This takes place first by conversion of the dihydrate form of CaSO4 to the τ form which preferentially nucleates the β form of PP. The crystallization behaviour in the latter case clearly reveals two processes. The presence of PEO which is used for the in situ preparation of CaSO4, however, is found to hinder the rate of crystallization and nucleation of the β form of PP but it gives a high degree of orientation of the CaSO4 needle-like crystals during extrusion of the PP-CaSO4 composites. © 1998 Chapman &amp; Hall.

School of Polymer Engineering

World University root node

Journal of Materials Science

Structure development in PP/CaSO4 composites: Part II Effect of filler on crystallization and morphology

The electrochromic response of polypyrrole (PPy)/Prussian blue (PB) composite films has been studied in different electrolytes such as KCl, LiClO4, K2SO4, KNO3, KI/I2, etc., by depositing the Prussian blue films on top of the conducting polypyrrole films, both being prepared by an electrochemical method. The results show that the use of PB on PPy not only yields high contrast but also extends the electrochromic response to a wider region of the visible spectrum, thus working as a sensitizer for improving the electrochromic contrast of the conducting polypyrrole.

Chemical Physics Letters

Electrochromic response in polypyrrole sensitized by Prussian blue

The structure development and mechanical properties of blow extruded polypropylene containing β-phase nucleating additives was studied. Quinacridone red and cadmium red were both found to nucleate the β phase in polypropylene, the former being a much more efficient nucleator than the latter. The β-phase spherulites formed in the presence of these nucleating agents were small and extensively volume filled, yielding high crystallinity. The modulus increased 2-3 times, elongation at break decreased, and there was a sharp break point without much yield when the β-phase nucleating agents were added as compared to the pure α-phase polypropylene. © 1997 John Wiley of Sons, Inc.

School of Civil Engineering

Journal of Applied Polymer Science

Effect of β-phase nucleating additives on structure and properties of blow extruded polypropylene

The crystallization behavior of polyethylene oxide (PEO) containing microdispersed nonlinear optical chromophores such as para-nitroaniline (PNA) has been investigated with respect to comopsition and different methods of film preparation techniques viz. solvent casting, melt casting, and powder molding. Large variations in the intensities of major reflections, 012 and 101, from PNA crystallites were observed depending on the composition as well as the method of preparation. The morphology of the samples examined under cross-polarizing conditions revealed highly birefringent crystallites dispersed in the spherulitic morphology of the PEO matrix in contrast to weakly birefrindgent crystals of the additive by itself. At high concentrations exceeding 45 wt % the PNA crystals act as substrates for the growth of polymer crystals. These results have been explained on the basis of intermolecular interaction as well as good lattice match between the crystalizing components, leading to preferential growth of the crystals along a certain direction. © 1997 John Wiley & Sons, Inc.

Crystallization behavior of polyethylene oxide/para-nitroaniline microdispersed composites

The paper introduces a new control system that's fast, accurate and intelligent. Unlike traditional techniques used till date, this system works in the optical domain i.e. it is run on OPTICAL COMPUTERS which are fast than the present day computers. The control system is a merger of Optical Computers, Fuzzy Logic, &amp; Neural Networks, Possible application of Genetic Algorithms are also proposed which are very good at finding an optimal solution. This paper deals with the advantages of optical computing, need of fuzzy logic &amp; essential merger with neural nets.

School of Computer Engineering & Technology

{IECEC}-97 {Proceedings} of the {Thirty}-{Second} {Intersociety} {Energy} {Conversion} {Engineering} {Conference} ({Cat}. {No}.{97CH6203})

Intelligent adaptive fuzzy-neural control system for applications in hazardous environments

The formation and electrical properties of vapour phase polymerised polypyrrole films on dip-coated polyethylene oxide (PEO)-cupric chloride substrates have been studied with respect to different deposition parameters. The substrate speed (U) during the dip-coating process affects the film thickness (d) and a relationship of the type da Un with n = 0.27 is followed. The X-ray diffraction studies reveal a distinct formation of ordered polypyrrole moieties but these are very small in size/number. The conductivity of the films increases very rapidly with the exposure time to pyrrole vapours as well as the concentration of the cupric chloride used in the complex. A sharp variation of conductivity with film thickness is also observed for thicknesses lower than 5 μm. These various results have been explained on the basis of formation of conducting polypyrrole domains in the crystalline regions of the polyethylene oxide complex giving rise to a composite type material in which the concentration and packing of the conducting moieties depend on the different deposition parameters used. © 1997 Elsevier Science S.A.

Thin Solid Films

Application of dip-coating process for depositing conducting polypyrrole films

The aging behaviour of conductivity in vapour phase deposited polypyrrole films has been investigated after storage in dry ambient temperature conditions. The decrease of conductivity with time is found to be complex suggesting a two-stage process. The rate of decrease of conductivity is also found to be dependent on the concentration of the dopant. Studies on changes in anisotropy and the X-ray photoelectron spectra suggest that morphological features and displacement of the dopant ions could be important factors governing the aging behaviour of these films. © 1997 Elsevier Science Limited.

Polymer Degradation and Stability

Long-term aging and stability of conductivity in vapour phase deposited polypyrrole films

The effect of CaCO3 on the crystallization behaviour and the modification of structure in polypropylene (PP) has been investigated using X-ray diffraction and optical microscopy. The crystallization half time deduced from spherulitic growth rate was found to vary sharply and decreased considerably from 5-6 min for pure polymer to less than 2 min in the presence of CaCO3. The ultimate spherulite size also decreased considerably for PP containing CaCO3. Its dependance on composition however, showed a plateau region at about 10-15 wt % of additive. The intensities of certain reflections especially the 130 and 040 of the α phase were greatly affected by the presence of CaCO3 and large variations in the crystallinity (Ci) values were observed with composition. The ratio of intensities of 130 and 040 reflections and the Ci revealed a maximum at a certain concentration of CaCO3. The above results can be explained on the basis of nucleation and preferential growth of the α phase of PP crystallites. © 1996 Chapman &amp; Hall.

Effect of CaCO3 on the crystallization behaviour of polypropylene

School of Petroleum Engineering

Mechanical Operations (ISBN 81 86314 27 X)

The structure and morphology of para-nitroaniline dispersed in various polymers such as polymethyl methacrylate, polyvinyl alcohol, polvinyl acetate and polyethylene oxide were investigated by X-ray diffraction and optical polarizing microscopy as a function of composition. At low concentrations the material showed little structure but at concentrations above 40% high crystallinity was observed. Although in all cases the crystal structure conformed to the monoclinic one with a = 12.33 Å, b = 6.07 Å, c = 8.59 Å and β = 91.45°, the intensities of different peaks especially the 101 and 012 reflections as well as the type of growth habit and morphology were strongly dependent on the polymer used.