Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials

Wuhan, China

Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials

Wuhan, China
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Tian R.,Hubei University | Wang X.,Hubei University | Wang X.,Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials | Chen R.,Hubei University | And 3 more authors.
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | Year: 2011

Ring-opening polymerization of L-lactide was successfully used to prepare single-walled carbon nanotube/poly(L-lactide)(SWCNTs/PLA) composites, and its degradability and thermal stability were explored. Fourier transform infrared (FTIR) spectra, Raman spectra, thermogravimetric (TGA) analysis and scanning electron microscopy were used to characterize the products.The results show that ring-opening polymerization takes place between the functionalized SWCNTs and L-lactide, resulting in attachment of poly(L-lactide) (PLA) chains to SWCNTs, and the SWCNTs/PLA composites can be hydrolyzed under alkaline solution. The DSC study suggests that the presence of functionalized SWCNTs can enhance the glass transition temperature (Tg) of the composite campared with pure PLA.


Huang M.,Hubei University | Yan S.,Hubei University | Chen C.,Hubei University | Wang L.,Hubei University | And 6 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2011

A soluble copolyimide was synthesized via the conventional two-step by using 4, 4'-diaminodiphenyl ether (ODA) as the diamine monomer, bisphenol A dianhydride(BPADA) and 4, 4'-oxydiphthalic dianhydride (ODPA) as the dianhydride monomers in dimethylformamide (DMF). The structure and performance of polymer were characterized by Fourier transform infrared spectrum(FT-IR), viscosity testing, solubility testing, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and tensile tests. The results show that there are characteristic peaks of polyimides around 1780 cm-1, 1720 cm-1 and 744 cm-1. The resulting is soluble in common organic solvents. It has good thermal stability with glass transition temperature of 221.1°C and decomposition temperature at initial above 512.4°C, and the residue at 800°C of 53.5% in nitrogen atmosphere. The copolyimide film has tensile strengths, tensile modulus, and elongations at break of 138.7MPa, 1.76 GPa, and 55.0% respectively.


Yan S.,Hubei University | Huang M.,Hubei University | Chen C.,Hubei University | Xu Z.,Hubei University | And 3 more authors.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2011

The authors synthesized three kinds of polyimides via conventional two-step thermal or chemical imidization process by using 2, 2-bis[4-(4-aminophenoxy)phenyl]propane(BAPP) and 4-phenyl-2, 6-bis (4-aminophenyl)pyridine (PBAP) as diamine, 2, 2-bis [4-(3, 4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) as dianhydride in dimethylformamide (DMF) solvent. The structure of the copolymers was analyzed by Fourier transform infrared spectroscopy(FTIR). The characteristic peaks of the polyimides in the FTIR spectra appeared around 1780, 1720, 725 cm-1. The properties of the products were measured by solubility tests, X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric (TG) analysis, tensile tests and water uptake tests. The polyimides so prepared were soluble in majority of conventional organic solvents and had good thermal stability. The polyimide films' initial decomposition temperatures were over 500°C, temperatures of 10% mass loss were 531.1-547.1°C and residue at 800°C was 40.7%-67.2% in nitrogen atmosphere. The tensile strength, tensile modulus and tensile strain at break of the polyimide films were 105.8-128.9 MPa, 2.14-2.32 GPa and 10.2%-18.3%, respectively. The water uptakes of the films reached 0.78%-0.96%.


Huang M.,Hubei University | Wang L.,Hubei University | Shen J.,Hubei University | Yi C.,Hubei University | And 3 more authors.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2011

A kind of soluble fluorinated poly (pyridine-imide) was synthesized via the conventional two-step method with 4-phenyl-2,6-bis[3-(4-amino-2-trifluoromethyphenoxy)phenyl] pyridine(m,p-6FPAPP) as the diamine monomer, pyromellitic dianhydride(PMDA) and 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) as the dianhydride monomers in dimethylformamide (DMF). The results show that characteristic absorption peaks of polyimide(PI) appear around 1780, 1720, 1380 cm -1 in the Fourier transform infrared spectroscopy (FTIR). The poly (pyridine-imide) so prepared can be soluble in conventional organic solvents. The obtained poly (pyridine-imide) has glass transition temperature of 263.3°C and the temperature at 10% mass loss of 563.8°C, and the residue at 800°C of 59.6% in nitrogen atmosphere. It exhibits UV absorption bands in the region of 200-350 nm and strong purple fluorescence emission peaks in the vicinity of 400 nm. Furthermore, the fluorescence intensity increases dramatically after protonation with hydrochloric acid.


Zhou W.,Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials | Zhou W.,Hubei University | Xia Y.,Hubei University | Tsai F.-C.,Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials | And 5 more authors.
International Journal of Pavement Engineering | Year: 2016

Epoxy asphalt curing system was prepared by sebacic acid compound with methyl-tetrahydrophthalic anhydride (MeTHPA) or Tung oil anhydride (TOA). Tensile strength, penetration, differential scanning calorimetry, dynamic mechanical thermal analysis, torn section microscopy photographs and scanning electron microscope analysis were utilised to investigate the mechanical properties, thermodynamic behaviour and micro-structure of epoxy asphalt curing systems under different curing agents. The results showed that in the presence of compound curing agent, the tensile strength and surface hardness of the epoxy asphalt curing system effectively improved, the induction period of the curing reaction decreased, the curing reaction mechanism turned to one-step reaction from two-step reaction, the Tg of asphalt phase and epoxy phase could simultaneously increase, and high-temperature damping performance also improved, but the particle size of asphalt dispersed in epoxy resin becomes uneven, while the curing system becomes semi-brittle from toughness. Compared to TOA, the effects of MeTHPA on such performance were more obvious. © 2016 Taylor & Francis


Sun Z.,Hubei University | Deng M.,Hubei University | Xu Z.,Hubei University | Xu Z.,Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials | And 2 more authors.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2012

The graft copolymer of methyl methacrylate (MMA) and butyl acrylate (BA) onto starch was prepared with cerium ammonium nitrate and potassium persulfate as initiators. The effects of the mass ratio of starch to MMA and BA on the grafting ratio and grafting efficiency were studied. The resultant graft copolymer was characterized by means of Fourier transform infrared spectroscopy (FTIR), hydrogen nuclear magnetic resonance ( 1H-NMR), X-ray diffraction (XRD) and thermogravimetric (TG) analysis. As the starch content was augmented, the grafting ratio of the copolymer decreased while the yield and grafting efficiency of the copolymer gradually increased. The graft copolymer of MMA and BA onto starch had good resistance to chemical solvents and thermal stability. Its initial degradation temperature exceeded 252.9°C and mass-maintain-rate at 800°C was 24.38% in nitrogen atmosphere. The tensile properties of the graft copolymer were excellent.


Yan S.,Hubei University | Ji C.,Hubei University | Xu Z.,Hubei University | Xu Z.,Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials | And 2 more authors.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2010

The authors synthesized three kinds of polyamides via conventional two-step thermal or chemical iridizations process with using 2,2-bis[4-(4-aminophenoxy)phenyl]propane(BAPP) and 4-phenyl-2,6-bis(4-aminophenyl)pyridine(PBAP) as diamante, and 3,3',4,4'-oxydiphthalic dianhydride(ODPA) as dianhydride in dimethylformamide (DMF) solvent. The structure of the copolymers was characterized by Fourier transform infrared spectroscopy (FTIR) and hydrogen nuclear magnetic resonance (1H-NMR). The characteristic peaks of the polyamides in the FTIR spectra appeared around 1 780, 1 720, 725 cm-1. The properties of the resultants were measured by thermogravimetric(TG) analysis and solubility, water uptake and tensile tests. The polyamides so prepared were soluble in majority of conventional organic solvents and had good thermal stability, their initial decomposition temperatures were over 500°C and residue at 800°C was 46.2%-64.5% in chemical iridizations process and 52.6%-64.8% in thermal imidization process in nitrogen atmosphere. The tensile strength, tensile modulus and elongation at break of the polyimide films were 107.2-109.6 MPa, 2.13-2.28 GPa and 7.8%-10.5%, respectively. The water uptakes of the films reached 0.68%-0.75%.


Wang L.,Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials | Huang M.,Hubei University | Xu Z.,Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials | Xu Z.,Hubei University | And 2 more authors.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2012

Nanoscale silica sol was made at ambient temperature by Stöber method and modified with 3-(trimethoxysilyl)propylmethacrylate (KH-570). The silica sol/fluoroacrylate nanocomposite emulsion was prepared by emulsion polymerization in the co-presence of an anionic and a nonionic emulsifier. The morphology of latex particles was characterized. The composition and properties of the copolymer, the stability of the emulsion and the performance of the emulsion film were tested. The results show that the nanocomposite particles have distinct core-shell structure; the emulsion has good stabilities of storage, dilution, heat-resistant and cold-resistance; the film made of the nanocomposite has water absorption of 12.50% and water contact angle of 93.5°; the nanocomposite's thermal stability is superior to that of general polyacrylate copolymer and fluorinated polyacrylate copolymer.


Liu D.,Hubei University | Zeng S.-M.,Hubei University | Hu Q.,Hubei University | Xu Z.-S.,Hubei University | Xu Z.-S.,Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2010

Highly branched poly(urethane-imide) (HBPUI) was synthesized via A 2+B 3 approach using isophorone diisocyante (IPDI), polycarbonatediol (PCDL), 3, 3', 4, 4'-benzophen-onetetracarboxylic dianhydride (BTDA) and poly(oxyalkylene) triamine (ATA) as materials. The structure of the products was characterized by Fourier transform infrared spectroscopy(FT-IR). The properties were measured by rotational rheometer, differential scanning calorimetry(DSC), thermal gravimetric analysis(TGA) and tensile tests. The HBPUI shows lower viscosity but a higher Tg than that of line poly(urethane-imide)(LPUI). Thermal gravimetric analysis indicates that the thermal degradation of poly(urethane-imide) occurs above 300 °C, which is higher in comparison with conventional highly branched polyurethane(HBPU), confirming that the introduction of imide function improves the thermal stability of HBPU. Tensile tests reveal that the tensile strength of HBPUI is obviously improved by increasing the content of hard segment and the molar ratio of [A 2]/[B 3]. however, the elongation at break displays a opposite trend.


Huang M.,Hubei University | Yan S.,Hubei University | Wang L.,Hubei University | Shen J.,Hubei University | And 6 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2012

Soluble fluorinated polyimides were synthesized via the conventional two-step method by using 4-phenyl-2, 6-bis[3-(4-amino-2-trifluoromethyphenoxy)phenyl]pyridine (m, p-6FPAPP) as the diamine monomer, 2, 2-bis[4-(3, 4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) and 3, 3', 4, 4'-biphenyltetracarboxylic dianhydride (BTDA) as the dianhydride monomers in dimethylformamide (DMF). The structure and performance of polymer were characterized by FT-IR, water uptake testing, solubility testing, DSC, TGA and UV-vis. The results show that there are characteristic peaks of polyimides around 1780 cm -1, 1720 cm -1 and 1380 cm -1 in FT-IR spectra. The polyimides are soluble in common organic solvents such as m-cresol, DMF, dimethylacetamide (DMAc), dimethyl sulfoxide (DMSO), (1-methyl-2-pyrrolidone) NMP, tetrahydrofuran (THF). They have good thermal stability, with the glass transition temperature (T g) of 202.1°C~219.7°C. Besides, their temperature at 10% mass loss is in the range of 537.0°C~572.8°C, while the weight maintenance rate of samples in 800°C is 60.7%~63.1% in nitrogen atmosphere. The PI films are also found to possess the cut-off wavelengths of 375 nm~380 nm and water uptake of 0.55%~0.63%.

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