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Journal of Renewable Materials 2019年第2期7卷 129-138页

作者： Paula do Patrocínio Dias Marcelo Aparecido Chinelatto Department of Materials Engineering-Campus II São Carlos School of Engineering-EESCUniversity of São Paulo-USPAv.João Dagnone1100-Jd.Sta AngelinaSão Carlos-SP-Brazil

In this study a low molecular weight triblock copolymer derived fromε-caprolactone and tetrahydrofuran was used as a non-reactive compatibilizer of immiscible PLA/PCL *** blends with 0,1.5 wt%,3 wt%and 5 wt% copolymer and about 75 wt%PLA were prepared by single screw extrusion and characterized by scanning electron microscopy(SEM),differential scanning calorimetry(DSC),dynamic mechanical analysis(DMA),tensile and Izod impact *** micrographs showed that the size of the dispersed PCL domains was practically constant regardless of copolymer *** result can be explained by the low shear rate employed during processing step and a decrease of PCL viscosity by presence of the triblock ***,when the copolymer concentration increased,strain at break of PLA/PCL blends also ***/PCL blend with 0 wt% copolymer presented 2%strain at break,whereas PLA/PCL blend with 5 wt%copolymer exhibited 90%.

关键词： blends non-reactive compatibilization poly(lactic acid) poly(ε-caprolactone) triblock copolymer

EFFECTS OF COMPATIBILIZERS ON THE MECHANICAL PROPERTIES OF LOW DENSITY POLYETHYLENE/LIGNIN blends

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Chinese Journal of Polymer Science 2009年第6期27卷 833-842页

作者：张琴傅强 Department of Polymer Science and Materials State Key Laboratory of Polymer Materials EngineeringSichuan University

Low density polyethylene(LDPE)/lignin blends were prepared using melt *** kinds of compatibilizers, ethylene-vinylacetate(EVA) which is softer than LDPE and polyethylene grafted with maleic anhydride(PE-g-MA) which is harder than LDPE were used to improve the interfacial *** electron microscope(SEM) was used to investigate the dispersion of lignin in LDPE *** results showed that both of the compatibilizers could improve the interaction between the low density polyethylene and l...

关键词： Low density polyethylene(LDPE) Lignin Compatibilizers Mechanical properties blends

MODULUS-COMPOSITION DEPENDENCE FOR blends OF PVC WITH SEGMENTED POLYURETHANES OF DIFFERENT SOFT SEGMENTS

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Chinese Journal of Polymer Science 1991年第1期9卷 55-64页

作者：肖凤飞施良和徐懋 Polymer Physics Laboratory Institute of Chemistry Academia Sinica

The dynamic mechanical modulus at 25℃ for blends of segmented polyurethanes with PVC was studied by using suitable mechanics models of multi-component systems. The analysis indicates that the blend morphology was mainly determined by soft segment structure of polyurethanes. The PPO-PU/PVC blends show typical two-phase morphology and their modulus-composition relations may be described by Halpin-Tsai model for domain-matrix two-phase *** the PCL-PU / PVC, PTMA-PU/PVC and PTMO-PU/PVC blends fit the Kerner's packed grain composite model. These results may imply that the modulus-composition relationship is sensitive to the interactions between the components and the mixture morphology of the blends.

关键词： blends Modulus Mechanics model PVC : Segmented polyurethane.

Energy storage properties of PVDF terpolymer/PMMA blends

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High Voltage 2016年第4期1卷 171-174页

作者： Baojin Chu Yang Zhou CAS Key Laboratory of Materials for Energy Conversion and Department of Materials Science and Engineering University of Science and Technology of ChinaNo.96 Jinzhai RoadHefeiAnhuiPeople’s Republic of China

Dielectrics can be used to store electric energy in capacitors and high-energy density of the materials is desirable to reduce the size or weight of *** improve the energy storage properties of poly(vinylidene fluoride–trifluoroethylene–chlorofluoroethylene)[P(VDF–TrFE–CFE)]terpolymer,P(VDF–TrFE–CFE)/poly(methyl methacrylate)(PMMA)blends were investigated in this *** adding a small amount of PMMA into PVDF terpolymer(blends can be improved as a result of the enhancement of elastic modulus of the *** the blends withblends is almost the same as that of PVDF ***,the energy storage performance of the terpolymer can be improved by blending with a small amount of PMMA.

关键词： poly vinyl blends dielectric

STUDY ON HIGH CONTENT OF blends IN CEMENT

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Journal of Wuhan University of Technology(Materials Science) 1999年第1期14卷 25-29页

作者： GUO Juncai Wuhan University of Technology Wuhan University of Technology China Editoral Dept. Journal of Wuhan University of Tech. Wuhan 430070 China

The technology of activation by adding few activators ( less than 1%) to increase the amount of blends in cement was investigated. The results show that outer activation has a remarkable effect on improving the physical properties of slag cement, flyash cement and volcanic cement. For example, the compressive strength was increased by 5-10 MPa. Morever, the application of activation is beneficial to grind-aiding, early strength and water-reducing etc. (Author abstract) 4 Refs.

关键词： blends grinding-aiding early strength water-reducing

Effects of gamma irradiation and moisture absorption on mechanical properties of PA6/PTFE blends

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Journal of Central South University 2008年第S1期15卷 560-563页

作者：罗文波肖华明谭江华吴国忠林明丽 Institute of Rheological Mechanics Xiangtan University Shanghai Institute of Applied Physics Chinese Academy of Sciences Meteorological Bureau of Xiangtan

PA6/PTFE blends with varying polytetrafluoroethylene content from 3% to 15%(mass fraction) were irradiated by 60Co gamma-ray with various doses(20,50 and 100 kGy) under ambient *** absorption test,U-notched Charpy impact test and quasi-static tension and bending were conducted to investigate the effect of irradiation on moisture absorption and mechanical properties of the *** is shown that the exposure of the blend to 60Co irradiation improves the tensile modulus,tensile strength and flexural modulus due to irradiation induced cross-linking in PA6 ***,the Charpy impact strength of the blends is much lower than that of the original PA6 and it decreases slightly with the increase of irradiation ***,the flexural modulus increases to a maximum value and then decreases with further increasing the PTFE content,and the moisture absorption decreases with the increase of the PTFE content and irradiation dose.

关键词： gamma irradiation PA6/PTFE blends tensile property bending modulus Charpy impact strength

Preparation and properties of poly(lactic acid)/cellulolytic enzyme lignin/PGMA ternary blends

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Chinese Chemical Letters 2012年第3期23卷 351-354页

作者： Wen Zhu Ouyang Yong Huang Hong Jun Luo Dong Shan Wang Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of ChemistryChinese Academy of SciencesGuangzhou 510650China National Engineering Research Center for Engineering Plastics Technical Institute of Physics&ChemistryChinese Academy of SciencesBeijing 100190China

Poly（lactic acid）-based ternary blends consisting of poly（lactic acid）（PLA）,cellulolytic enzyme lignin（CEL）,and polyolefine grafting maleic anhydride（PGMA） were prepared by extrusion blending and the mechanical properties and the morphology of the ternary blends were *** was found that the mechanical properties varied with various loading of the components in the *** to neat PLA,the tensile strength and the Young＇s modulus of the ternary blends were decreased,but the elongation at break and the impact strength were effectively *** electron microscope observations revealed that the CEL plays a bridging role between PLA and PGMA,enhancing the miscibility between them and resulting in the improvement of ductility and toughness of the ternary *** the cost and performance,we obtained the optimal blend PLA/CEL/ PGMA（80/20/20,w/w/w）,of which the impact strength and the elongation at break were doubled as that of neat PLA,and the tensile strength remained moderate.

关键词： Polycaprolactone Cellulolytic enzyme lignin Tougher blends

THE COMPATIBILITY OF blends OF POLY(VINYL CHLORIDE) OR CHLORINATED POLY(VINYL CHLORIDE) WITH POLY(METHYL METHACRYLATE)

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Chinese Journal of Polymer Science 1988年第2期6卷 186-191页

作者：王庆国程镕时 Department of Chemistry Nanjing Univeristy Nanjing

IR spectral shifts of carbonyl vibrational absorption for ethyl acetate, which acts analogically as the structural unit of poly(methyl methacrylate), in cyclohexane, chloroform, chlorinated paraffins, poly(vinyl chloride) and chlorinated poly(vinyl chloride) were measured. The results suggest that there are specific interactions between the carbonyl groups and the chlorinated hydrocarbons which could be responsible for the apparent compatibility of poly(vinyl chloride)—poly(methyl methacrylate) and chlorinated poly(vinyl chloride)—poly(methyl methacrylate) blends. Additionally, the effects of the preparation mode of blend films on phase separation and observed compatibility are discussed.

关键词： blends Compatibility Poly(vinyl chloride) Chlorinated poly(vinyl chloride) Poly(methyl methacrylate)

A New Criterion for Brittle-Ductile Transition of Polymer blends

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Science China Chemistry 1993年第8期36卷 920-926页

作者：郑文革漆宗能施良和 State Key Laboratory of Engineering Plastics Institute of Chemistry Academia Sinica Beijing 100080 PRC

The Tc criterion was first used by S. Wu for characterizing the brittleductile （B-D） transition of N6/EPDM blends. But in this paper, a new criterion which is based on the stress analysis of blends is proposed to characterize the B-D transitions of blends, namely, A criterionVfc and dc are the critical volume fractions and particle size of dispersed particles in blends, respectively. For given blends, A is independent of the morphology of dispersed phase and is only the characteristic parameter of matrix. The B-D transitions of different blends, including polar N6/EPDM blends, nonpolar PP/EPDM blends and PE/CaCO3 composites, were manipulated with A criterion and satisfactory results were obtained. In addition, a new master curve for the impact strength of PP/EPDM blends versus Vf2/d was obtained. The results showed that A criterion is more suitable than Tc criterion for characterizing the B-D transition of blends.

关键词： polymer blends brittle-ductile transition stress analysis A criterion.

Percolation Model of Brittle-Ductile Transition in PP/EPDM blends

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Chinese Science Bulletin 1993年第2期38卷 120-123页

作者：郑文革李强漆宗能 State Key Laboratory of Engineering Plastics Institute of Chemistry Academia Sinica Beijing 100080 PRC

1 Introduction S. Wu reported the brittle-ductile transition master curve for the relation between the notched izod impact strength of Nylon-6/EPDM blends and rubber fractions. It was interpreted by the strong interaction between polar Nylon-6 matrix and modified EPDM dispersed phase. However, similar brittle-ductile transition master curve in non-polar PP/EPDM blends was also observed in this laboratory (Fig. 1).

关键词： PP/EPDM blends brittle-ductile transition critical matrix ligament thickness (T_c) stress volume sphere percolation model.