xMo₆O₁₇ by solid phase reaction. It has been prepared from stoichiometric mixture MoO₃ and MaI，or Na₂C₂O₄ in N₂ atmosphere at high temperatures. The method for composition and thermal analysis is also discussed in it.]]> 2015/7/4 9:19:34 Wang Bengen and Yuan Peisheng 18true 4 at 150 C. The presence of significant transesterification is proved by ¹³C-NMR spectroscopy and differential scanning calorimetry (DSC) in blend of L-PLA/PCL. The average lengths of lactone block Lc and of L-lactide block L1-in the copolymer are calculated from ¹³C-NMR spectra and their molar composition are derived from ¹H-NMR spactra.]]> 2015/7/4 9:19:34 Chen Jianhai 17true 4). The structure and properties of PTC depend directly on the molar ratio of Ti(OBu)₄/PC. The spinnability and the melting point of PTC change regularly with this ratio. It is attributed to the formation of the crosslinked structure by-Ti-O-as bridge group and the pendant structure by-Ti(OBu)₃ as side group. The relation between structure and properties of PTC has been studied in this paper. SiC fiber containing Ti has been obtained from PTC-0.02 and PTC-0.04 with good spinnability as their precursors.]]> 2015/7/4 9:18:59 Li Aiping and Song Yongcai 16true 4) without using any reaction promoter. In this reaction，PS was decomposed into polysilane of low molecular weight (LPS) containing Si-C skeleton and Si-H bonds. Then PTC was obtained by the reaction of Si-H bonds in LPS with Ti(OBu)₄ accompanied by the conversion of Si-Si skeleton in LPS into Si-C skeleton. In this paper，the synthesis process and structure of PTC-Ⅱ prepared by this new method，compared with PTC-Ⅰ obtained by old method，and the properties of SiC fiber containing Ti using PTC-Ⅱ as the precursor were examined and discussed.]]> 2015/7/4 9:18:59 Song Yongcai, Feng Chunxiang, Lu Yi and Tan Zilie 15true 3P)₂ PdCl₂ as catalyst. The copolymers are of blackbrown color，insoluble in benzene， CHC1₃，THF and ethyl alcohol and infusible until 350℃. The higher the ratio of DEB in copolymerization，the larger the density (d₄²⁵) of copolymers，the higher the yield of copolymers and the less the swellability (θp) and average molecular weights between crosslinks (Mc ). When DEB/BD≥1/2 (mole ratio of monomers)，the best solvent of copolymers is benzene and the solubility parameter(δp) is 9.15 cal^0.5?cm^-1.5，when DEB/BD=1/5，the best solvent of copolymer is ethyl alcohol and δp is 12.7 cal^0.5? cm^-1.5.IR spectra of homopolymers and copolymers are drawn and studied and reaction mechanism of copolymerization is suggested.]]> 2015/7/4 9:18:59 Li Yinkui 14true 2 -(CH₂)₆N₄?HCI-H₂O at 30℃ has been investigated by the phase-equilibrium method，the refractive indexes of the liquid phases have also been determined separately. The results show that the double salt which has the composition of 2NiC1₂ -(CH₂)₆N₄?HCl?9H₂O is formed in the cited ternary system. The thermochromic chracteristic of the equilibrium solid phase at 13℃ have been studied and its thermochromic mechanisms are inquired preliminarily.]]> 2015/7/4 9:18:59 Zhou Jiayin, Zhou Shiguang, Qi Youxun and He Guiqing 13true 3P)₂PdCl₂ as catalyst. In the copolymerization，the best mole ratio of two monomers diphenylbutadiyne and phenylacetylene is 1/2. The catalytic homopolymerization of diphenylbutadiyne is superior to that of the thermal homopolymerization. According to infrared and ¹H-NMR spectra，the structure of polymer (l) and copolymer (2) may a11 be trans-transoidal configuration.]]> 2015/7/4 9:18:59 Li Yinkui and Luo Shufang 12true 2 can not be treated as the mixture of o-H₂ and p-H₂ is given. The correct method of explaining the residual entropy of H₂ from the definition of the spectroscopy entropy is presented.]]> 2015/7/4 9:19:00 Chen Guoqiang and Zhao Yin 11true 2015/7/4 9:19:00 Zeng Shiyu and Chen Guoqiang 10true 2015/7/4 9:19:00 Zhou Jiayin, Zhou Shiguang, Qi Youxun and Pan Yuqin 9true 2015/7/4 9:19:00 Zhang Zhiyi, Lu Yi and Tan Zilie 8true 2015/7/4 9:20:31 1, Bai Shuxin¹, Zhao Qinghai¹, Qiao Mingjun² and Wang Rong²]]> Zhang Jiachun¹, Bai Shuxin¹, Zhao Qinghai¹, Qiao Mingjun² and Wang Rong² 7true 3)PPVO] was synthesized in propionic acid solvent. The composition of T(P-OCH₃)PPVO was determined as C₄₈H₃₆N₄O₄VO? 4H₂O by elemental analysis and EDTA complexometric methods. The UV-visible spectra showed that the formation of the title coordination compound，and the ligand and coordination compound are macrocyclic. Disappearance of the N-H stretching vibration peak in IR spectra of the T(P-OCH₃)PPVO revealed the introduction of the central ion VO²⁺ into the porphyrin ring. The TG-DTA-DTG results demonstrated that the different dewatering mechanism of the ligand and complex are four molecules of H₂O broken away in one step (the ligand)，and two by two stepwise of the four H₂O molecules(the complex). Sixteen distinct lines attributed to interaction of nuclear spin of vanadium(Ⅳ)with the 3dI electron appeared clearly in the ESR spectra of title macrocyclic compound，indicating that its structural model is a distorted octahedron belonging to C_4v point group.]]> 2015/7/4 9:20:20 1, Zhou Jiayin¹, Zhou Shiguang¹, Qi Youxun¹ and Zhuo Zongliang²]]> Fang Meiyu¹, Zhou Jiayin¹, Zhou Shiguang¹, Qi Youxun¹ and Zhuo Zongliang² 6true 3)₂ ? 6H₂O with the macrocyclic schiff base has been synthesized by the template reaction of copper(Ⅱ)nitrate with O-phenylenediamine and O-phthalicaldehyde in absolute ethane medium. The characteristics of the products have been analyzed by elemental analysis, IR spectra, UV-visible spectra, molar conductance, magnetic susceptibility，differential thermal analysis (DTA) and thermogravimetry (TG) measurements. Based on these analyses, the composition, structure and symmetry of the complexes have been discussed, meanwhile, the properties and mechanism of electrochromism of the complex are preliminary investigated.]]> 2015/7/4 9:20:20 Zhou Yongqiang, Zhou Jiayin, Zhou Shiguang and Qi Youxun 5true 1HNMR.]]> 2013/11/18 0:00:00 Long Yongfu,Wang Jianyin,Li Yinkui and Fan Zhenxiang 4true 2013/11/18 15:32:32 Li Dezhan,Li Yinkui,Long Yongfu and Zhang Hongping 3true 2012/8/28 10:27:55 XIONG Shizhao,XIE Kai and HONG Xiaobin 2true 2015/12/31 10:11:32 1, ZHANG Zhenshan¹ and WANG Jinzhong²]]> ZHANG Fangfang¹, ZHANG Zhenshan¹ and WANG Jinzhong² 1true