| 1. | the intrinsic viscosities reported were detemined in benzene at 25℃. 特性粘数是在苯中于25测定的。 |
| 2. | Standard test method for intrinsic viscosity of cellulose 纤维素固有粘度的标准试验方法 |
| 3. | Intrinsic viscosity , limiting viscosity number 特性黏数 |
| 4. | Method for the determination of intrinsic viscosity of bottle grade polyester chip for import and export 进出口瓶级聚酯切片特性粘度测定方法 |
| 5. | The effects of the mole ratio of anhydride to amino group of chitosan in the feed solution on the solubility , intrinsic viscosity and molecule weight of the product were studied 研究了投料物质的量比对产物的溶解性、特性黏度和相对分子质量的影响。 |
| 6. | 2 jn vitro degradation study . mass loss , intrinsic viscosity , volume , acidity and compressive strength changes during storage at 37c in saline forl - 8 weeks was determined for the two groups of scaffolds 将不同空隙率材料置入生理盐水中,在37孵浴1 - 8周,比较各组ph值、质量、固有粘滞系数、体积及抗压强度的变化。 |
| 7. | The simulation results show that the shaped degree is decreasing when the spinning temperature and intrinsic viscosity are increasing ; the spinning speed has little effect on the shaped degree when the pump mass throughput is constant ; the shaped degree is increasing with the increasing of pump mass throughput when the spinning speed is constant ; the cross air - blow conditions have much effect on the shaped degree ; the scope of shaped cegree is increasing when the aspect ratio of spinneret hole is increasing ; the shaped degree has obvious decreasing tendency in the small zone of spinning path and this decreasing became gently when the pump mass throughput is increasing 模拟的结果表明:扁平纤维的异形度随着纺丝温度及特性黏度的升高而降低;泵供量一定时,纺速对异形度的影响不大;纺丝速度一定,异形度随着泵供量的增大而增大;吹风条件对异形度的影响较大;随着喷丝孔的长宽比的增大,异形度增加的幅度也较大;异形度在纺程上较小的区间内有明显的下降趋势,并随着泵供量的增加其下降的趋势变缓。 |
| 8. | Through the characterization of the molecular weights of pam , sem and dsc of composite , the results clarified the change of mechanical properties of composites . the tensile strength and impact strength of pam2 / pa - 6 composite showed that were related to the content of initiator naoh for the polymerization of e - caprolactam . the intrinsic viscosity of pam , sem and the crystallinity of nylon phase carried out the results , which explained the change of mechanical properties of composites 对于pam2 pa - 6体系,复合材料的拉伸强度与冲击强度随醛胺摩尔比的变化趋势与引发剂用量有关,通过pam2分子量、尼龙结晶度、球晶形态、 sem以及dsc等表征方法对这种变化趋势的研究表明,复合材料的力学性能与上述因素有密切的关系。 |
| 9. | Lactide were investigated . the key factors affecting the polymer intrinsic viscosity were found to be monomer recrystallization times , stannous octoate concentration and polymerization time . the thermal stabilizing agent did not significantly affect the polymer molecular weight . the polymer with a viscosity average molecular weight beyond 200000 was fairly reproducible by optimizing the polymerization conditions . it was found that poly 单体重结晶次数辛酸亚锡浓度聚合时间等条件均是影响聚合物特性粘数的重要因素。热稳定剂对聚丙交酯的分子量几乎没有影响。优化聚合条件可以获得粘均分子量大于200000的聚丙交酯材料,聚合结果具有良好的重复性。 |
| 10. | 2 . there were statistically differences between the groups in acidity and compressive strength changing at the first 6 weeks after degradation test , mass loss and intrinsic viscosity changed significantly in whole period , volume contract happened after the 2nd week ( p < 0 . 05 ) . 3 . after modified with alginate calcium , the scaffolds have the much higher hydrophilic ability , water uptake reached 50 - 60 % ( v / v ) from 0 . 5 to 24 hours , no significant difference found between the inner groups 经过藻酸钙改性后的支架亲水性能得到良好改善,体积含水量在24小时内保持在5o朋之间,区组、组内比较无显著性差异中劝刀5 ) ;酒精处理后吸水率达到个12之间,显著高于对照组的2 10 ,区组和组内比较均存在显著性差异(卜 |