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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
Tongchang Zhou, Zhiqiang Zou, Jianqun Gan, Liban Chen, Min Zhang
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...... hiện toàn bộ
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
Ruei-Shin Chen, Chin-Ping Yang
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...... hiện toàn bộ
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
Artee Arora, Veena Choudhary, D. K. Sharma
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) ...... hiện toàn bộ
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
Ravi Bhushan Pathak, Piyush Kumar, Anand Prakash Mishra, Vijay Verma
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...... hiện toàn bộ
Uniaxial Orientation and Crystallization Behavior of Amorphous Poly(ethylene terephthalate) Fibers
Springer Science and Business Media LLC - - 2006
Ming‐Xun Ren, Zhiying Zhang, Shizhen Wu, Jia Wei, Changfa Xiao
The production of poly(3-hydroxybutyrate) by thermophilic Caldimonas manganoxidans from glycerol
Springer Science and Business Media LLC - Tập 25 - Trang 1-8 - 2018
Li-Jung Hsiao, Ming-Chieh Lee, Po-Jen Chuang, Yu-Yuan Kuo, Ji-Hong Lin, Tzong-Ming Wu, Si-Yu Li
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 ...... hiện toàn bộ
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
Zhifeng Cao, Yong Jin, Qing Miao, Chunyan Ma, Biao Zhang
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...... hiện toàn bộ
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
Elaheh Kowsari, Vahid Ansari, Abbas Moradi, Alireza Zare, Mehrzad Mortezaei
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...... hiện toàn bộ
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
Qifeng Jin, Huiyang Yu, Yuanjing Zhang, Jinyao Chen, Ya Cao
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...... hiện toàn bộ
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
Selvin Thomas Palakattukunnel, Sabu Thomas, P. A. Sreekumar, Sri Bandyopadhyay
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...... hiện toàn bộ
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