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Copolymerization of epoxides and carbon dioxide by using double metal cyanide complex (DMC) with high crystallinity
Springer Science and Business Media LLC - Tập 18 - Trang 2071-2076 - 2011
Zn3 [Co(CN)6]2 based double metal cyanide complex(Co-Zn DMC) is synthesized and
characterized by element analysis, FT-IR, TG-FTIR, XRD and TEM. The composition
of Co-Zn DMC summarized by elemental analysis has been confirmed by TG-FTIR. The
catalyst has high crystallinity according to strong crystalline peaks shown in
XRD and diffraction spot observed by TEM. Copolymerization of epoxides and
carbo...
Alternate poly(amide-imide)s based on 1,4-and 1,3-bis(4-trimellitimido)benzene and their mixtures
Springer Science and Business Media LLC - Tập 5 - Trang 233-241 - 1998
Several series of alternate poly(amide-imide)s [P(A-alt-I)s] were synthesized by
aromatic dicarboxylic acid (I- p or I- m), which was prepared by the
condensation of p-phenylenediamine (or m-phenylenediamine), trimellitic
anhydride, and various aromatic diamines by means of direct polycondensation. A
diimide-diacid (I- p) with a p-phenylene group was used to synthesize
P(A-alt-I)s III, and P(A-alt...
Effect of clay content and clay/surfactant on the mechanical, thermal and barrier properties of polystyrene/organoclay nanocomposites
Springer Science and Business Media LLC - Tập 18 - Trang 843-857 - 2010
In the present paper, three ammonium salts namely, tetraethylammonium bromide
(TEAB), tetrabutylammonium bromide (TBAB), and cetyltrimethylammonium bromide
(CTAB) were employed to prepare organoclay by cation exchange process.
Polystyrene (PS) /clay nanocomposites were prepared by melt blending using
commercial nanoclay and organoclays prepared using above mentioned salts. X-ray
diffraction (XRD) ...
Fabrication of nanocomposite membrane composed of sulfonated PVDF and thermo-mechanically modified fly ash for application in direct methanol fuel cells
Springer Science and Business Media LLC - Tập 30 - Trang 1-18 - 2023
The present work deals with the fabrication of cost-efficient nanocomposite
proton exchange membrane (PEM), prepared by incorporation of nanoparticles of
Fly Ash (FA) collected from M/s Bina thermal power plant Madhya Pradesh India;
within the host PVDF [poly(vinylidene fluoride)] polymer matrix. Subsequently,
the nanocomposite membranes are treated with the well-known sulfonating agent
chlorosulf...
Uniaxial Orientation and Crystallization Behavior of Amorphous Poly(ethylene terephthalate) Fibers
Springer Science and Business Media LLC - - 2006
The production of poly(3-hydroxybutyrate) by thermophilic Caldimonas manganoxidans from glycerol
Springer Science and Business Media LLC - Tập 25 - Trang 1-8 - 2018
Glycerol is an abundant and inexpensive raw material, suitable for the use in
fermentation as value adding to agricultural waste. To fully understand how to
convert both pure and refined glycerol into Poly(3-hydroxybutyrate) (PHB) using
thermophilic Caldimonas manganoxidans. A high PHB concentration can be obtained
by using the following fermentation conditions: un-buffered initial pH of 7 and
50 ...
Synthesis and characterization of dual responsive graft copolymers composed of casein and poly(N-isopropylacrylamide)
Springer Science and Business Media LLC - Tập 19 - Trang 1-10 - 2012
A series of novel temperature- and pH- responsive water-soluble graft
copolymers, casein-g-poly(N-isopropylacrylamide)(PNIPAAm), were prepared via a
direct graft copolymerization of N-Isopropylacrylamide (NIPAAm) from casein. The
polymerization was induced by tert-butyl hydroperoxide (TBHP) in water at
general condition. Chemical structures of the graft copolymers were
characterized by Fourier tra...
Poly(amide-imide) bearing imidazole groups/sulfonated polyimide blends for low humidity and medium temperature proton exchange membranes
Springer Science and Business Media LLC - Tập 22 - Trang 1-15 - 2015
A poly(amide-imide) (PAI) bearing imidazole groups on the polymer chain was
synthesized via direct polycondensation of a synthesized diacid-diimide and
4,4′-(1,4-Phenylenediisopropylidene) bisaniline (PDBA). Diacide-diimide was
synthesized by the condensation of an amino acid compound, (S)-(+)-Histidine
hydrochloride monohydrate and 3,3′,4,4′-Benzophenone tetracarboxylic dianhydride
(BTDA). On the...
Influence of urea on polarization property and mechanical properties of polyvinyl alcohol films for the polarizers
Springer Science and Business Media LLC - Tập 29 - Trang 1-9 - 2022
Poly (vinyl alcohol) (PVA) is an ideal material for preparing the polarizing
film because of its excellent transparency and dying properties. In the present
work, urea was used to act as a PVA plasticizer to modify the crystallization
behavior by controlling the intensity of the intermolecular hydrogen bond. The
results had shown that the incorporation of the plasticizer decreased the
crystallinit...
Poly(ethylene-co-vinyl acetate)/calcium phosphate nanocomposites: contact angle, diffusion and gas permeability studies
Springer Science and Business Media LLC - Tập 18 - Trang 1277-1285 - 2010
Poly(ethylene-co-vinyl acetate) (EVA) based nanocomposites were prepared by melt
mixing in an internal mixer with nanoparticles of calcium phosphate. Contact
angle measurements of the composites with water and methylene iodide were
measured. Parameters such as total solid surface free energy, work of adhesion,
interfacial free energy and spreading coefficient were calculated. The
interaction param...
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