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stability lowered
相关语句
  稳定性变差
     With temperature rising the gelation time is shortened and the gel stability lowered.
     温度增高时成胶速度加快,凝胶的稳定性变差
短句来源
  “stability lowered”译为未确定词的双语例句
     The results showed that the reducibility of [Al (i-Bu )3+C8H17OH] to Ni(naph)2 and the catalyst activity of this system increased with the decrease of the molar ratio of C8H17OH/Al(i-Bu)3,but the molecular weight of polymer decreased and the catalyst stability lowered .
     结果表明,随ROH/Al值的减小,Al剂对Ni的还原能力增大,两者的关系可表示为ROH/Al=0.52-0.67ln(Ni/Al剂); 催化活性提高,但聚合物的分子量降低,催化稳定性下降。
短句来源
     It was found that the unit cell contracted and the thermal stability lowered after the modification.
     试验结果表明,上述改性引起晶胞体积收缩,热稳定性降低。
短句来源
  相似匹配句对
     S. stability.
     S.
短句来源
     On Dynamic Stability
     论动态稳定
短句来源
     With temperature rising the gelation time is shortened and the gel stability lowered.
     温度增高时成胶速度加快,凝胶的稳定性变差。
短句来源
     it lowered the cost.
     (5)制备的光催化剂对光线的依赖程度低,降低了处理成本。
短句来源
     It was found that the unit cell contracted and the thermal stability lowered after the modification.
     试验结果表明,上述改性引起晶胞体积收缩,热稳定性降低。
短句来源
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The rules of catalyzed polymerization of butadiene was studied with nickel catalyst system Ni(naph)2-[Al(i-Bu)3+C8H17OH] -BF3 ?OEt2 under different molar ratio of C8HI7OH/ Al(i-Bu)3, and the reactions between Ni(naph)2 and [Al (i-Bu)3+C8H17OH] were measured by using magnetic susceptibility . The results showed that the reducibility of [Al (i-Bu )3+C8H17OH] to Ni(naph)2 and the catalyst activity of this system increased with the decrease of the molar ratio of C8H17OH/Al(i-Bu)3,but the molecular weight of polymer...

The rules of catalyzed polymerization of butadiene was studied with nickel catalyst system Ni(naph)2-[Al(i-Bu)3+C8H17OH] -BF3 ?OEt2 under different molar ratio of C8HI7OH/ Al(i-Bu)3, and the reactions between Ni(naph)2 and [Al (i-Bu)3+C8H17OH] were measured by using magnetic susceptibility . The results showed that the reducibility of [Al (i-Bu )3+C8H17OH] to Ni(naph)2 and the catalyst activity of this system increased with the decrease of the molar ratio of C8H17OH/Al(i-Bu)3,but the molecular weight of polymer decreased and the catalyst stability lowered . All the Ni (I) and Ni(0) could constitute the active centers .

研究了Ni(naph)_2-[Al(i-Bu)_3+C_8H_(17)OH]-BF_3·OEt_2[简称Ni-(Al+ROH)-B]体系在不同ROH/Al(mol比)值下催化丁二烯聚合的规律,井应用磁化率法测试了Ni与(Al+ROH)(Al剂)的反应。结果表明,随ROH/Al值的减小,Al剂对Ni的还原能力增大,两者的关系可表示为ROH/Al=0.52-0.67ln(Ni/Al剂);催化活性提高,但聚合物的分子量降低,催化稳定性下降。在最佳ROH/Al值为0.7—0.8时,聚合物的顺式-1,4含量为95.7%—96.3%。

Baimiaozi natural clinoptilolite was modified by treating with NH 4Cl heat immerson and HCl immerson.It was characterized by chemical analysis,XRD,IR,TG DTA and N 2 adsorption at 77K.It was found that the unit cell contracted and the thermal stability lowered after the modification.Treatment with NH 4Cl causes less framework dealumination,but enhances crystallinity and increases micropore volume.In the case of treatment with HCl,the framework...

Baimiaozi natural clinoptilolite was modified by treating with NH 4Cl heat immerson and HCl immerson.It was characterized by chemical analysis,XRD,IR,TG DTA and N 2 adsorption at 77K.It was found that the unit cell contracted and the thermal stability lowered after the modification.Treatment with NH 4Cl causes less framework dealumination,but enhances crystallinity and increases micropore volume.In the case of treatment with HCl,the framework dealumination changes with HCl concentration,with reduction in crystallinity and decrease in micropore volume.Meanwhile,K + ions of the coordinated framework of the zeolite are located in the 8 membered ring channels parallel to the axis,which are more difficult to remove than Ca 2+ ,Mg 2+ and Na + Fe 3+ ions in the clinoptilolite entered the zeolite framework in the form of FeO - 4 tetrahedra,the removal of which was more difficult than that of Al 3+ .

用HCl浸渍、NH4Cl浸煮改性白庙子斜发沸石,并采用化学分析、低温N2静态吸附、XRD、FT-IR和TG-DTA等手段对其表征。试验结果表明,上述改性引起晶胞体积收缩,热稳定性降低。NH4Cl浸煮骨架脱Al少,结晶度增高,微孔体积变大。HCl浸渍骨架脱Al随酸度变化,结晶度降低,微孔体积减小。同时,配位K+离子定位于平行a的八员环孔道中,比其他阳离子难脱除。Fe3+以FeO-4四面体参加到沸石骨架中,脱Fe比脱Al困难

The effect of polymer (HPAM) concentration, pH, temperature and calcium ion concentration on gel formation of low concentration HPAM/Cr3+ aqueous solutions(mass ratio HPAM/Cr3+ 15/1, Na+ concentration 5000 mg/L) is studied. The experimental results show that with HPAM concentration derceasing the gelation rate and the gel strength and stability decrease and the pH range for gels to be formed becomes narrow. In this pH range the higher the pH value the higher the gelation rate and the gel strength and stability...

The effect of polymer (HPAM) concentration, pH, temperature and calcium ion concentration on gel formation of low concentration HPAM/Cr3+ aqueous solutions(mass ratio HPAM/Cr3+ 15/1, Na+ concentration 5000 mg/L) is studied. The experimental results show that with HPAM concentration derceasing the gelation rate and the gel strength and stability decrease and the pH range for gels to be formed becomes narrow. In this pH range the higher the pH value the higher the gelation rate and the gel strength and stability are. With temperature rising the gelation time is shortened and the gel stability lowered. The gel strength is decreased with the increase of calcium ion concentration.

研究了聚合物浓度、pH、温度及Ca2+浓度对低浓度部分水解聚丙烯酰胺(HPAM)凝胶成胶行为的影响。实验结果表明:随着体系中聚合物浓度的降低,成胶速度降低,所成凝胶的强度和稳定性降低,成胶的pH范围变窄。在成胶的pH范围内,pH愈高,则成胶速度愈快,所成凝胶的强度愈高,稳定性也愈好。温度增高时成胶速度加快,凝胶的稳定性变差。Ca2+浓度增大时所成凝胶的强度下降。

 
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