Entity

Time filter

Source Type


Xie J.,Sun Yat Sen University | Xie J.,Shihezi University | Xie J.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering | Tian J.,Chinese Academy of Sciences | And 5 more authors.
Bioorganic and Medicinal Chemistry Letters | Year: 2011

A series of pyrrolo[2,3-c]azepine derivatives was designed, synthesized, and evaluated as a new class of inhibitors against protein tyrosine phosphatase 1B (PTP1B) in vitro. The results demonstrated that compounds bearing a biphenyl moiety were proved to markedly influence the potency of these inhibitors. Particularly, compounds 29, 35 and 36 showed interesting inhibition with IC 50 value of 16.36, 14.93 and 13.92 μM, respectively. © 2011 Elsevier Ltd. All rights reserved. Source


Wang J.,Shihezi University | Wang J.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering | Liu Z.Y.,Shihezi University | Liu Z.Y.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering
Asian Journal of Chemistry | Year: 2013

The materials of acrylic acid-Ca-montmorillonite were synthesized by dehydration reaction between the ethanol/cyclohexane mixed solvent of the reactants of acrylic acid and the cyclohexane solution of alkaline calcium base montmorillonite (acid-activated montmorillonite, calcium oxide and deionized water). The hybrids were characterized by fourier transformation infrared spectroscopy (FT-IR), wide angle X-ray powder diffraction (WXRD), thermogravimetric (TG) analysis. FT-IR analysis showed carboxyl group (-COOH) of acrylic acid reacted with hydroxyl group (-OH) of Ca-montmorillonite. WXRD analysis showed that acrylic acid intercalated the montmorillonite and the basal spacing increased from 1.39 nm of acid-activated montmorillonite to 1.6 nm of acrylic acid-Ca-montmorillonite. Thermogravimetric analysis showed that the thermal stability of organo-montmorillonite enhanced. Influences of synthetic parameters in the experiment were studied in detail. According to single factor analysis of synthetic parameters, the optimum preparation conditions was 5 g Ca-montmorillonite, 5 g acrylic acid, 50 mL hexamethylene as dispersing agent, 60 mL ethanol/hexamethylene solution (8:52, volume ratio), reaction time 3 h, stirring rate 150 r/min. The poly(vinyl acetate)/montmorillonite nanocomposite emulsion was prepared by in site intercalative emulsion polymerization of vinyl acetate in the presence of organo-montmorillonite. The wide angle X-ray powder diffraction results demonstrated that the montmorillonite was exfoliated during polymerization. The bonding power of the nanocomposite emulsion of containing 3 % organo-montmorillonite was the best one. Source


Fang Z.H.,Shihezi University | Fang Z.H.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering | Duan H.Y.,Shihezi University | Duan H.Y.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering | And 11 more authors.
Applied Surface Science | Year: 2011

Novel UV curable waterborne polyurethane coatings (UVWPU) modified by melamine was prepared using isophorone diisocyanate (IPDI), polyethylene glycol (PEG), α,α-dimethylol propionic acid (DMPA), hydroxyethyl acrylate (HEA) as main materials. Copolymer structure was verified using Fourier transform infrared spectroscopy (FT-IR). Performance of the coatings was evaluated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), and mechanical tests such as pencil hardness and resistance to water. The results showed that the modified UVWPU film had the good thermal resistance, water resistance and mechanical properties. The optimum melamine dosage was 4.70 wt.%, the glass transition temperature (Tg) of the modified film increased by 20.4 °C and 5% weight-loss temperature (253 °C) increased by 105 °C. No change color, crinkle, desquamate, dehisce and frothy were found after the modified film dried at 130 °C for 2 h. © 2010 Elsevier B.V. All rights reserved. Source


Fang Z.H.,Shihezi University | Fang Z.H.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering | Shang J.J.,Shihezi University | Shang J.J.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering | And 8 more authors.
Express Polymer Letters | Year: 2010

In this study, the modified ultraviolet (UV) curable waterborne polyurethane was obtained from isophorone diisocyanate (IPDI), polyethylene glycol (PEG, MW=600), αα-dimethylol propionic acid (DMPA), hydroxyethyl acrylate (HEA) and bisphenol A. The rigid moiety was introduced into the main chain of polyurethane to improve its heat-resistance. The copolymer structure was confirmed by Fourier transform infrared spectroscopy (FT-IR). Thermal property and UV curable behavior of the coatings were investigated. The glass transition temperature (T g) of the modified film was determined by differential scanning calorimetry (DSC). Thermal gravimetric analysis (TGA) was employed to investigate the thermal stability of the modified film. The results show that the average particle diameters increased from 69.25 to 95.12 μm as the content of bisphenol A increased from 0.00 to 9.25%. The optimum bisphenol A dosage was 7.23% (wt%), the T g of the modified film increased by 7.07°C and 5% weight-loss temperature (233°C) increased by 14°C. The optimum irradiation time was 10-20 minutes after the coatings being painted on an armor plate at room temperature and initiator dosage was 5% (wt%) of the latex. © BME-PT. Source


Shang J.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering | Shang J.,Shihezi University | Wu J.,Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering | Wu J.,Shihezi University | And 10 more authors.
Advanced Materials Research | Year: 2011

The poly(lactic acid) (PLA) was modified by 4, 4'-diphenylmethane diisocyanate (MDI) successfully prepared to improve the stability of PLA. The MDI and the hydroxyl terminated PLA could form PLA modified by MDI (MDI-PLA) via addition reaction. The structure of MDI-PLA was confirmed by FTIR and its degradation properties were investigated. The results showed that the pH of the aqueous media and the ion strength together played an important role in the degradation behavior of the PLA and MDI-PLA. Both of the PLA and MDI-PLA had the highest degradation rate in 0.01 M NaOH. It offers the best stability to hydrolysis resistance by adding the 0.6 wt% of MDI to the PLA materials, and have a more stable of 15 times than unmodified PLA. © (2011) Trans Tech Publications, Switzerland. Source

Discover hidden collaborations