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| 1 | Probing the Two-stage Transition upon Crossing the Glass Transition of Polystyrene by Solid-state NMR显示文摘A two-stage transition upon crossing the glass transition of polystyrene with increasing temperature was precisely determined and interpreted by using solid-state nuclear magnetic resonance(SSNMR), ~1H-~1H dipolar couplings based double quantum-filtered(DQF) and dipolar filter(DF) experiments and ^(13)C chemical shift anisotropy(CSA) based centerband-only detection of exchange(CODEX) experiment are used to fully characterize the time scale of molecular motions during the glass transition. While differential scanning calorimetry(DSC) and CODEX experiment predicted the first stage of glass transiton, DQF and DF experiments provided the evidence for the second stage transition during which the time scale of molecular motions changed from very slow(t > ms) to very fast(t < μs). The first stage of glass transition begins with the occurrence of remarkable slow re-orientation motions of the polymer backbone segments and ends when the degree of slow motion reaches maximum. The onset and endpoint of the conventional calorimetric glass transition of polystyrene can be quantitatively determined at the molecular level by SSNMR. In the second stage, a subsequent dramatic transition associated with the melting of the glassy components was observed. In this stage liquid-like NMR signals appeared and rapidly increased in intensity after a characteristic temperature T_f(~1.1T_g). The signals associated with the glassy components completely disappeared at another characteristic temperature T_c(~1.2T_g). | Yong-jin Peng Chen-ting Cai Rong-chun Zhang Tie-hong Chen 孙平川 李宝会 Xiao-liang Wang Gi Xue An-Chang Shi | 2016 | Chinese Journal of Polymer Science2016，34，4： | 2 |
| 2 | Preparation of the derivate of polythiophene显示文摘 | Shi Jin Gi Xue | 1997 | Macromolecules1997，30，19： | 1 |
| 3 | An investigation of the eleetropolymerization of terthiophene in boron fluoride-ethyl ether 显示文摘 | Zhang Donghui Qin Jingui Xue Gi | 1999 | Synthetic Metals1999，100，3： | 1 |
| 4 | The preparation of inorganic coagulant-poly ferric sulfate显示文摘 | Gending Ji Gi Xue | 1997 | Journal of Chemical Technology and Biotechnology1997，68，： | 1 |
| 5 | Interaction between thiophene and solvated Lewis acids and the low-potential electrochemical deposition of a highly anisotropic conducting polythiophene film 显示文摘 | Jin Shi Xue Gi | 1997 | Macromolecules1997，30，19： | 1 |
| 6 | Electrochemical copolymerization of furan and 3-methyl thiophene显示文摘 | Liang Li Wei Chen Ning Xu Zhenggang Xiao Gi Xue | 2004 | Journal of Materials Science2004，，7： | 1 |
| 7 | Conformation and Structural Relaxation of Partially Disentangled Solution显示文摘 | Jinglu Chen Gi Xue Yanhong L 等 | 2001 | Macromolecules2001，34，： | 1 |
| 8 | Preparation of electrically conducting polypyrrole in oil/water microemulsion显示文摘 | Yan Feng Xue Gi Zhou Mingshi | 2000 | Appl Polym Sci2000，77，1： | 1 |
| 9 | Effect of noise on frequency and time domain methods of T wave alternans显示文摘 | Xue JQ Rowlandson GI | 2004 | Computers in Cardiology2004，31，： | 1 |
| 10 | Magnetic and conduc- ting particles: Preparation of core-shell Fe304-PPy nano- composites显示文摘 | Chen Wei Li Xingwei Xue Gi | 2003 | Appl Surf Sei2003，218，： | 1 |
| 11 | LOW POTENTIAL ELECTROPOLYMERIZATION OF ANISOTROPIC CONDUCTIVE POLYTHIOPHENE FILMS AND FABRICATION OF ELECTRICAL DEVICES显示文摘The complexation of thiophene with a Lewis acid with moderate acidity as a solvent, such as BF3-ethyl ether (BFEE) remarkedly lowered the electrochemical polymerization potential. The positively chargedmetal surface of electrode in the process of electrochemical deposition enhanced the coordination interactionbetween π-electrons of thiophene unit and the metal, which makes thiophene rings lie parallel to the surfaceof electrode, resulting in a highly ordered polymeric structure. Because of the large intra-chain transferintegrals, the transport of charge is believed to be principally along the conjugated chains, which is muchgreater than the inter-chain hopping. The specific electrical resistance across the polythiophene film thicknessis more than 104 times than that along the surface plane of the film. In this paper we review the recentdevelopment of polymerization technique by low potential electrochemical method performed in our lab andseveral electrical devices in which the compact polythiophene films, such as anionic and cationic sieves, andlaminate film junction of undoped polythiophene derivatives were used. | Xiao-bo Wan Yun Lu Xiao-rong Liu Liang Zhou Shi Jin Gi Xue Department of Polymer Science and Engineering, the State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China | 1999 | Chinese Journal of Polymer Science1999，17，2： | 1 |
| 12 | An investigation of the electropolymerization of terthiophene in boron fluorideethyl ether显示文摘 | Zhang Donghui Qin Jingui Xue Gi | 1999 | Synthetic Metals1999，100，3： | 1 |
| 13 | Interaction between thiophene and solvated Lewis acids and the low-potential electrochemical deposition of a highly anisotropic conducting polythiophene film显示文摘 | Jin Shi Xue Gi | 1997 | Macromolecules1997，30，19： | 1 |
| 14 | Synthesis of conducting poly- aniline/TiO2 composite nano? bres by one-step in situ polymer ization method显示文摘 | Bian Chaoqing Yu Yijun Xue Gi | 2006 | Journal of Applied Polymer Science2006，，： | 1 |
| 15 | Electrochemical copolymerization of furan and 3-methyl thiophene显示文摘 | Liang Li Wei Chen Ning Xu Zhenggang Xiao Gi Xue | 2004 | Journal of Materials Science2004，，7： | 1 |
| 16 | Low potential electrochemical syntheses of heteroaromatic conducting polymers in a novel solvent system based on trifluroborate-ethyl ether显示文摘 | Wei Chen Gi Xue | 2005 | Progress in Polymer Science2005，30，7： | 1 |
| 17 | β-Phase Crystallization of Poly(vinylidene fluoride) in Poly(vinylidene fluoride)/Poly(ethyl methacrylate) Blends显示文摘The nature of the crystalline phase of poly(vinylidene fluoride)(PVDF) in compatible blends with poly(ethyl methacrylate)(PEMA) was investigated by using X-ray diffraction(XRD), infrared microscopy(IR) and differential scanning calorimetry(DSC). The βphase of PVDF was observed after quenching from the melt and further annealing above the glass transition temperature over a composition range. The PVDF/PEMA blend with weight ratio of 3:2 has formed higher content of PVDF β crystals than others. By taking advantage of fast cooling rate of ultrafast differential scanning calorimeter(UFDSC), the quenching process of blends was modeled and tested simultaneously, and the melting behavior of β crystals in all blends was investigated. Three types of crystallization behavior of βphase PVDF in blends were found after quenching-annealing at different temperatures. | Zi-Jie Huang Jing Jiang Gi Xue Dong-Shan Zhou | 2019 | Chinese Journal of Polymer Science2019，37，1： | 1 |
| 18 | Synthesis and characterization of electrically conducting polyaniline in water-oil microemulsion显示文摘 | Gi Xue | 1999 | Journal of Materials Chemistry1999，12，9： | 1 |
| 19 | Carbon nanotube/polyaniline core-shell nanowires prepared by in situ inverse microemulsion显示文摘 | Yijun Yu Bo Che Zhihua Si Liang Li Wei Chen Gi Xue | 2005 | Synthetic Metals2005，，3： | 1 |
| 20 | Nanocomposites based on rutile TiO2 and polyaniline显示文摘 | Bian Chaoqing Xue Gi | 2007 | Materials Letters2007，61，： | 1 |
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