The effects of dissolving on the structure and thermal properties of PPTA through IR spectra and TG were studied and the inherent viscosity and its relative molecular weight of PPTA solution with the influence of kinds of factors including dissolution time,solution temperature,concentration of the solution,concentration of strong sulfuric acid and stirring speed of twin screw were discussed.
分析溶解时间、温度、溶液质量分数、硫酸质量分数、双螺杆转速等溶解条件对PPTA的比浓对数黏度ηinh、相对分子质量的影响。
The factors that may cause degradation of poly(p-phenylene terephthalamide)(PPTA) during preparation were studied by measuring the inherent viscosity.
通过测量不同条件下聚对苯二甲酰对苯二胺(PPTA)溶液的比浓对数黏度,分析在PPTA纺丝前可能引起聚合物降解的因素,这些因素包括纺丝液浓度、残余的CaCl2、N-甲基-2-吡咯烷酮、水分和氢氧化钙等,最终得到水分和氢氧化钙对PPTA的降解影响很大,其余影响较小的结论。
After ruling out the effect of catalyst, comparison test, property test verification of burning rate retardant agent polyformalde-hyde with various type were carried out, and indicated that the logarithmic specific concentration viscosity of polyformaldehyde was the reason of higher pressure exponent of propellant.
对降速剂聚甲醛进行了不同型号的对照试验、性能测试及试验验证,从而确定了聚甲醛的对数比浓粘度是影响推进剂压力指数偏高的原因。
The inherent viscosity (Ⅰ.
这里研究了添加剂对聚合过程的影响,讨论了添加剂用量、加料时间等因素对聚对苯二甲酰对苯二胺的比浓对数粘度的影响,并通过结构及性能测试证明了高分子添加剂PVP的加入不影响聚对苯二甲酰对苯二胺的化学结构、结晶性能和热性能。
logarithmic viscosity number
对数粘[度]数，比浓对数粘度
Activity coefficient Number expressing the ratio of a substance's chemical activity to its molar concentration.
活度系数:化学术语,活度系数指物质的化学活度对其浓度之比。
having or suggesting a viscous consistency.
有粘性的浓度或使想起粘性的浓度。
Effect of Effective Concentration of High Melting Point Phases in RH Refining on Slag Sticking
RH精炼渣高熔点相作用浓度对粘渣的影响
A comparison study on the mechanical strength of two resin cements
两种粘结系统树脂粘结剂机械强度的对比(英文)
The Effect of Etching Concentration on the Bond Strength of the Light-cured Resin Reinforced Glass Ionomer Cement;
酸蚀浓度对光固化树脂加强型玻璃离子水门汀粘结强度的影响
Study of the Effect on the Shear Bond Strength of Orthodontic Brackets of Different Concentration Fluorided Etching Fluid;
不同浓度氟化酸蚀液对托槽抗剪粘接强度影响的研究
coefficient of kinetic viscosity
动力粘性系数，动力粘度
concentration coefficient of sedimentatio
沉积[的]浓度系数
concentration coefficient of diffusion
扩散[的]浓度系数
Effects of the Solution Concentration on the Parameter of Zinc Electro-deposition
溶液浓度对锌电沉积参数的影响研究
Sorption and Immobilization of Low-Concentration PAHs in Water by HDTMA Modified Clays;
HDTMA改性粘土对水中低浓度多环芳烃的吸附固定作用研究
The Effects of Intermittent High Glucose on the Expression of Adhesion Molecules and Production of NO in Cultured HUVECs;
波动性高浓度葡萄糖对HUVECs粘附分子表达及NO分泌的影响
Bronchial Mucus Transport Velocity in Patients Receiving Sevoflurane-based General Anesthesia
全麻时不同浓度的七氟醚对支气管纤毛粘液转运率的影响
Determination of polymyxin B on pan-drug resistance Acinetobacter baumanii MIC
测定多粘菌素B对泛耐药鲍曼不动杆菌的最小抑菌浓度
The raw material concentration is one order of magnitude lower than the concentration in the traditional fixed state process.
原料浓度比传统定态过程低一个数量级
The Relation between the Ratio of Hydrogen Bonding Acceptor Number to Donor Number and Solute Concentration
氢键受体与供体数目比与溶质浓度的关系
The Measurement of High-Concentration Polymer Solution's Viscoelastic Behaviors and the Study of Reasonable Polymer Solution Injection Concentration
高浓聚合物粘弹性检测及合理注聚浓度研究