In anionic waterborne polyurethane system, the effects of the crosslinking agent content on medium-resistance properties of emulsion and mechanical properties of the film were studied.
In this paper,the heat-and medium-resistance properties of HNBR were reviewed with 41 references,and the recent formulations in improving the heat-and medium-resistance of HNBR were introduced.
WPU resin prepared by liquid-state PCDL T-981 has better luster and elongation at break, while WPU resin prepareded by solid-state PCDL T-5652 has better tensile strength and medium resistance.
Mechanical and dynamic mechanical properties and medium resistance of polyurethane based on hydroxy-tarminatad polyepichlorogydrin (PECH) were studied.
The cold resistance and medium resistance of soft PVC blend with various polymeric modifiers were studied by brittleness temperature test,dynamic mechanical test, Gehman test and Ross flex test.
The results show that mechanical properties,hardness and solvent resistance of the waterborne polyurethane film prepared by two steps are optimum at 1.2% content of crosslinking agent of TMP and MA-TMP as internal emulsifier.
Although the fluorine rubber has the outstanding heat resistance and solvent resistance property, it also have some problems such as sticking the mold, the bad fluidity in processing.
The tests of curing condition, resistance to medium and hydrothermal ageing showed that the J-200-1D adhesive has excellent processing properties and resistance to weathering.
This adhesive can be cured at mediate temperature (120 ℃ ) within 0.5 h and has high bonding strengths , toughness and good hot/wet durable properties.
The animals were divided into groups characterized by high, low-, and medium- resistance to hypoxia by the time of respiration arrest during inhalation of gas mixture containing 3% O2.
The animals were divided into groups characterized by high, low-, and medium- resistance to hypoxia by the time of respiration arrest during inhalation of gas mixture containing 3% O2.
Red Companion is less susceptible to soft rot (Erwinia carotovora) and corky ring spot (Tobacco Rattle Virus) than Dark Red Norland and has a medium resistance to early blight (Alternaria solani).
Time constant was modulated by changing medium resistance via volume or ionic strength, yielding an average transfection efficiency of 25% and mortality rates below 60%.
The important step for securingdeep penetration into the fissures of thesealant may be achieved by selecting oflow-viscous epoxy-resin as raw ma-terial, since the viscosity of the self-curing sealant affects its properties toa large extent. In this study the CGY-331 and E-51 epoxy resins were usedto synthesize the EM resins.All of themcontain about 25 percent MMA. It isfound that the viscosity of the formeris 120-260 centipoise at 25℃, and thelatter 400 centipoise at 25℃.Thus EMresin synthesized by CGY-331 ...
Terminated iso-propyl xanthic sulfide liquid neoprene rubbers possess fairly good anti-solvent properties and excellent anti-combustion properties. It can be used as lining materials for chemical engineering equipment, anti-extraction plasticizer of polar rubbers, and anti-combustion paints. This rubber can also be used as modifiers for improving the adhesion properties of some solid rubbers, such as EPDM.
Determined by a series of modern analytic methods, IR, PC, NMR, XRD and DSC, it was shown that the copolymerization emulsion adhesive of acrylate is charaeteried by the structure of butyl acrylate(BA)-vinyl acetate (VAc)-maleic anhydride(MA)tricopolymer emulsion. The experiment results proved that this adhesive has a high stability, good adhesion, good resistance to medium and non-poisonuos to human. It was expected to be as a good adhesive for laminating PVA/PE, PVA/PP, PVA/AL foil, and PVDC/PE laminated f...
耐介质性能
medium-resistance
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