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Chinese Journal of Polymer Science 1987年第3期5卷 191-196页

作者：卞新声韩孝族汪新仁张庆余 changchun institute of applied chemistry academia sinica changchun

A series of liquid chloroprene-methacrylic acid copolymcr （CP--co-MAA） modified epoxy resin （ER）/poly （butyl methacrylate）（PBMA）. semi-IPN were synthesized. Some physical properties were investigated. DSC diagrams showed two indistinct and inward endothermal transitions corresponding to the transitions of two networks in the semi-IPN system. By observing morphology with SEM technique it shows that there is a multiphase structure, in which CP-co-MAA’s. domain sizes arc about 0.10--0.80μ. With increasing C/E ratio, the domain eizes are getting smaller, which is due to effect of mixing network of CP-co-MAA promoting entanglement and interpenetrating of PBMA and CP-co-MAA-ER network. In most of the semi-IPN’s compositions, ER phase readily maintains its phase continuity while PBMA phase presents a band shape structure. Consequently, crosslinking network keeps in its continuous phase more readily than uncrosslinking one, thus it influences dominantly on the physical properties.

关键词： Interpenetrating Polymer Network Copolymer of Chloroprene and Methacrylic Acid Morphology of IPN Poly(Butyl Methacylate) Toughened Epoxy Resin

RADIATION-INDUCED EMULSION POLYMERIZATION OF STYRENE IN SOAP-FREE SYSTEM

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Chinese Journal of Polymer Science 1985年第1期3卷 11-16页

作者：张万喜孙家珍 changchun institute of applied chemistry academia sinica changchun

Radiation-induced emulsion polymerization of styrene in soap-free system has beenstudied and the monodisperse polystyrene lattices were obtained. Both its purity and emulsionconversion are better than that of chemical... 详细信息

关键词： ST Poly RADIATION-INDUCED EMULSION POLYMERIZATION OF STYRENE IN SOAP-FREE SYSTEM SOAP

FREQUENCY DEPENDENCE OF THE DIELECTRIC RELAXATION OF 1,2-POLYBUTADIENES

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Chinese Journal of Polymer Science 1987年第1期5卷 34-39页

作者：倪少儒余赋生沈联芳钱保功 changchun institute of applied chemistry academia sinica changchun

The dielectric loss factor and permittivity of a series of 1, 2-polybutadienes with different contents of 1, 2-units and different contents of syndiotactie 1, 2-units were determined over a frequency range from 30Hz to 100KHz at different temperatures. The WLF equation was evaluated for various samples with Tθat 100KHz as a reference temperature and the master curves of various samples have been constructed, which are in accordance with those calculated by Havriliak-Negami equation. The frequency dependence of the dielectric relaxation of 1, 2-polybutadienes was investigated over a frequency range from 100 Hz to 1012 ZHz in terms of the experimental data and the master curves.

关键词： 1, 2-Polybutadiene Dielectric Properties Permittivity

NORMAL VIBRATIONAL ANALYSIS OF CIS-POLYACETYLENE

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Chinese Journal of Polymer Science 1987年第4期5卷 308-315页

作者：王建瓴景遐斌冯之榴 changchun institute of applied chemistry academia sinica changchun

The normal vibrational calculation was carried out on cis-polyacetylene（PA） and its model compound, cis, trans-2, 4--hexadiene. Based on the observed IR and Raman frequencies, force constants relevant to the cis-structure were refined. Finally a force field common for cis-PA, trans-PA and three model moleculaes was obtained. The observed spectra of cis-PA were theoretically assigned and the similarities and differences between the cis-and trans- conjugate systems were discussed on the basis of normal coordinate calculation.

关键词： Polyacetylene IR of Polyacetylene Raman spectra of polyacetylene Vibrational spectra of polyacetylene Vibrational analysis of polyacetylene.

CHARACTERIZATION OF RADIATION GRAFTING DEGREE OF POLYSTYRENEg-ACRYLIC ACID BY XPS

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Chinese Journal of Polymer Science 1990年第4期8卷 359-362页

作者：车吉泰张万喜 changchun institute of applied chemistry Academia Sinica

In this work, characterization of radiation grafting degree of polystyrene-g-acrylic acid by XPS was studied. It is found that along with the main peak C_(1s) there is a photoelectron peak at 289.0 eV that appears to be C_(1s) of-(?)-OH group and shows the presence ofpolyacrylic acid grafted on the polystyrene The grafting degree obtained by XPS is in agreement with that from the gravimetric method.

关键词： Polystyrene-g-Acrylic Acid Radiation grafting XPS

CHARACTERIZATION OF RADIATION CROSSLINKING DENSITY OF F-40

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Chinese Journal of Polymer Science 1990年第3期8卷 283-286页

作者：张万喜张月芳孙家珍 changchun institute of applied chemistry Academia Sinica

In this paper, radiation-induced crosslinking mechanism and characterization of the crosslinking density of F-40 and F-4 by X-ray photoelectron spectroscopy （XPS） have been studied. The dose of gelation of F-40 obtained from XPS is 4.1×10;Gy. It is found that crosslinking density is the largest in the range of certain dose for F-40 and F-4.

关键词： XPS The dose of gelation F-40 F-4 Radiation crosslinking

STRUCTURE EFFECTS ON THE SOL FRACTION-DOSE RELATIONSHIP IN RADIATION CROSSLINKING OF POLYMERS

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Chinese Journal of Polymer Science 1985年第1期3卷 17-25页

作者：张万喜孙家珍钱保功 academia sinica changchun changchun institute of applied chemistry changchun Wuhan Branch of academia sinica Wuchang

The structure effects of polymers on the relationship between sol fraction and radiation dose arediscussed in detail. In consideration of the deviation of experimental results from Charlesby-Pin-ner’s and Chen-Liu-Tang’s expressions relating sol fraction to radiation dose, we introduced an ex-ponent βconcerned with the structure and property parameters of a polymer （glass transition tem-perature T;and molecular internal rotating steric factor δ） and assumed that the fracture density isproportional to R;（R is radiation dose）. Thus, a general expression, formula （9）, relating solfraction to radiation dose is derived. When β=1 andβ=0.5, this expression is reduced to the above-said two expressions. Us-ing this general expression, the experimental data of a number of polymers are treated. It is shownthat the expression is in good agreement with the experimental results, βvalue is in the range of 0. 5 to1.0.

关键词： Poly Chen STRUCTURE EFFECTS ON THE SOL FRACTION-DOSE RELATIONSHIP IN RADIATION CROSSLINKING OF POLYMERS

Effect of Rare Earth on Microstructure and Properties of Pure Copper

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Rare Metals 1993年第4期12卷 277-280页

作者：党平赵连山鲁化一唐定骧 changchun institute of applied chemistry Academia SinicaChangchun 130022China

Metallograph and scanning electron microscope studies of the distribution and function of rare earth metals in copper show that RE can reduce the oxygen content, fine the grain cells of copper, and enhance the mechanical and electrical properties. Excess RE in copper will lead to the formation of some RE compounds like Fe-Cu-RE and FECu6.

关键词： Electric properties Mechanical properties Microstructure Performance Rare earth elements

Hydrogen Sensing Property of Lanthanum Complex Fluoride

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Journal of Rare Earths 1993年第2期11卷 115-119页

作者：吴明娒任玉芳 changchun institute of applied chemistry Academia SinicaChangchun 130022China

Four potentiometer sensor cells have been prepared by using La0.95Pb0.05F2.95 as solid electrolyte(SE) and various materials as electrodes. The sensor cell `Bi(BiF3)|SE|Pt' exhibits the best performance with its 90% response time as short as 75 s to 100 Pa H2 in air at room temperature and with its linear decrease of electromotive force (EMF) with an increase of the logarithm of hydrogen partial pressure in the experimental range. The sensor cell shows weaker response to CO.

关键词： Electric field effects Fluorine compounds Gas sensing electrodes Hydrogen Pressure effects Solid electrolytes Thermal effects

SYNTHESIS AND PROPERTIES OF THERMOTROPIC COPOLY(ESTER IMIDE)S

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Chinese Chemical Letters 1996年第7期7卷 605-608页

作者： De Wen DONG changchun institute of applied chemistry Academia Sinica.Changchun 130022

A series of copoly(ester imide)s is synthesized by thermal polycondensation of N,N'-hexane-1,6-diylbis(trimellitimide), p-hydroxybenzoic acid and diphenols with different structures. Their thermotropic liquid crystal properties are studied by DSC measurements and polarizing microscopy. II is found that the steric effect of nonlinear bisphenol modifiers is the most important factor in controlling the liquid crystallinity of the resulting copoly(ester imide)s.

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