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粘度测定     
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  viscosity measurement
     Influence of the composition on gelatification of phenol-formaldehyde (PF) resol resin/bo-rate (Na2B4O7·10H2O) (SB ) aqueous solution systems was investigated by the phase diagram and the viscosity measurement.
     利用凝胶相图和粘度测定研究了组成对甲阶酚醛树脂(PF)/硼酸盐(Na2B4O7·10H2O)(SB)水溶液体系凝胶化的影响。
短句来源
     Principles of Viscosity Measurement and Their Applications
     粘度测定原理与应用
短句来源
     Methods First calulation the Casson yield strees of patient's blood and go into its to average of normals method of patient's experiment result,synthetically analytical the quality of the blood viscosity measurement of everyday(each one) of patients make use of the Levey-Jennings quality control graph and common control rule.
     方法计算患者血液Casson屈服应力,并将其引入患者结果均值质控法,用Levey-Jennings质控图来综合判断每日(批)患者为单位的血液粘度测定的质量。
短句来源
     By viscosity measurement and sedimentation experiment, the influences of those parameters such as the dispersion medium, method of dispersion, the type of dispersant, pH value and temperature on the preparation of ATO slurry were discussed.
     实验将纳米ATO粉体进一步深加工制备成分散稳定的纳米ATO导电涂料。 通过粘度测定和沉降实验,讨论了分散介质、分散方法、分散剂种类、pH值及温度等参数对制备浆料的影响,进行优化筛选,最终确定制备分散性、稳定性均较好的纳米ATO浆料的工艺。
短句来源
     Objecteve To investigate and build up the quality control method of the blood viscosity measurement.
     目的探讨并建立血液粘度测定的质量控制方法。
短句来源
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  viscometry
     An Approach to the Viscometry of Polysufone Resins Dilute Solution
     聚砜树脂稀溶液粘度测定的研究
短句来源
     The mentioned above view is testified with the viscometry and gel permeation chromatography (GPC).
     文中并通过粘度测定和凝胶渗透色谱(GPC)图谱对此给以阐明。
短句来源
     The correlation Mark-Houwink equation for this polymer have been established by the measurement of frac-tionated samples with light scattering and viscometry methods.
     通过分级试样的光散射和粘度测定确立了相应的Mark-Houwink方程.
短句来源
     The structure and viscosity of the intermacromolecular complex solution formed through hydrogen bonding complexation of poly(acrylic acid)(PAA)with poly(ethylene oxide)(PEO)were studied by means of viscometry and refraction index measurement. The factors affecting the solution viscosity and the viscosity enhancement of the PAA/PEO complex solution were also investigated.
     通过溶液折光指数和粘度测定 ,研究了聚丙烯酸 (PAA)与聚氧化乙烯 (PEO)高分子链间在复合溶液中的相互作用和 PAA/ PEO高分子氢键复合溶液的结构与粘度 ,研究了复合溶液粘度随溶液 p H值的变化规律及不同浓度时剪切速率对复合溶液粘度和复合增粘效果的影响。
短句来源
  viscosity determination
     THE REAPPEARANCE VERIFICATION ABOUT GRAIN VISCOSITY DETERMINATION SITH CAPILLARY VISCOSIMETRY(GB 5516—85)
     对GB5516—85粮食粘度测定毛细管粘度计法再现性的验证
短句来源
     In this paper, the spectrophotometric, cyclic voltammetric methods and viscosity determination were used to study the interaction of the anti tumor active Et 2SnCl 2 with DNA.
     利用循环伏安、紫外光谱和粘度测定等手段 ,对二氯二乙基锡 [Et2 Sn Cl2 ]与 DNA的作用机制进行了研究 .
短句来源
     Application of blood viscosity determination in brain injuries
     血粘度测定在颅脑损伤中应用
短句来源
     The curing kinetics of polyurethane-modified bisphenol-A-type epoxy resin (PUDGEBA/PSt) simultanous semi-IPN's at room temperature has been investigated by chemical titration and viscosity determination.
     用化学滴定、粘度测定等方法,研究了苯乙烯含量对聚醚型聚氨酯改性双酚A型环氧树脂(PUDGEBA)/聚苯乙烯(PSt)室温同步半-IPN's(简称SIPN's)体系固化动力学的影响。
短句来源
     Effect of Temperature on Cotton Cellulose Viscosity Determination
     温度对棉纤维素粘度测定的影响
短句来源
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  viscosity measure
     Study on the Apparent Viscosity Measure Method of Coal Water Mixture
     水煤浆表观粘度测定方法的研究
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      viscosity measurement
    Solubility of cellulose carbonate was tested by optical microscopic observation, UV absorbance and viscosity measurement.
          
    Traditional methods of viscosity measurement, such as cone-and-plate and concentric cylinder viscometers, are not adequate for these fluids.
          
    Influence of the temperature on the compatibility of the polystyrene / AB-g-S graft copolymer / cyclohexanone have been studied by light scattering and viscosity measurement.
          
    The molecular weights were estimated by gel permeation chromatography (GPC) and solution viscosity measurement and it was confirmed that high molecular weight resins were formed in organic solvents.
          
    The gelation process was monitored by means of viscosity measurement.
          
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      viscometry
    The dynamics of the structure disintegration in the A-175 aerosil dispersions in water and sodium dodecylbenzenesulfonate (SDBS) aqueous solutions was studied by the rotational viscometry.
          
    The interaction between the anionic and cationic polyelectrolytes of various molecular masses and charges and the ionic surfactants in aqueous and salt solutions is studied by viscometry, conductometry, light scattering, and electrophoresis.
          
    The structure and molecular dynamics of complexes of poly(acrylic acid) with dodecyl-substituted poly(ethylene glycol)s in aqueous solutions are studied by viscometry and spin probe ESR spectroscopy.
          
    Structural transformations occurring at an early stage of the gelation are studied by the dynamic light scattering, IR Fourier spectroscopy, and viscometry.
          
    IR spectroscopy data, along with the data on viscometry and tensiometry, allowed us to suggest the qualitative model of gel structure formation.
          
    更多          
      viscosity determination
    Adaption of a vane tool for the viscosity determination of flavoured yoghurt
          
    Viscosity determination and end group analysis were applied to measure molecular weights of chitosan oligomers.
          
    Errors involved in the viscosity determination from a single concentration using an approximate formula were also ascertained.
          
    The errors in viscosity determination do not exceed a few per cent.
          
    The effect of these results on viscosity determination is discussed.
          
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    10 10~4 (10-10~4)±0.1.10~(8.5) 10~(16) 1%.

    水文主要介绍中国科学院冶金陶瓷研究所矽酸盐研究室为进行玻璃粘度测量所应用的两种仪器和它们的测量方法。 高温粘度计根据平衡称重落球法的原理设计,仪器主要包括高温电炉,平衡称重天秤,电源与测温系统等部分。盛玻璃熔体的坩堝和球体均用铂制造。仪器的粘度测量范围为10~1~10~4泊。经用已知粘度的氧化硼熔体校准,表明在测量范围内其粘度对数的读数偏误不大于±0.1。 低温粘度计根据玻璃丝伸长的原理设计。仪器主要包括铜心电炉,光学放大系统,电源和测温系统等部分。仪器的粘度测定范围为10~(8.5)~10~16泊。经用已知粘度的玻璃校正,表明其在固定粘度下相应温度的读数误差不大于1%。 此外,作者对于用上述两种方法进行玻璃粘度测量的物理原理和几个与设计,应用有关的实际问题也作了简略的介绍与讨论。

    Three nylon-9 samples with M_η = 20400, 12900 and 7100 were fractionated twice into 20 fractions using phenol as solvent and methanol as precipitant. Number average molecular weights,M_n, were determined by titration of carboxyl groups in benzyl alcohol at 175℃ and viscosity measurements were carried out in phenol-acetic acid mixed solvent (2:1 by weight) at 25℃.Seven fractions were used for the determinations and the experimental data fit either of the following equations: [η]=7.52×10~(-3)M~(0.96)ml/g M=200[η]-360...

    Three nylon-9 samples with M_η = 20400, 12900 and 7100 were fractionated twice into 20 fractions using phenol as solvent and methanol as precipitant. Number average molecular weights,M_n, were determined by titration of carboxyl groups in benzyl alcohol at 175℃ and viscosity measurements were carried out in phenol-acetic acid mixed solvent (2:1 by weight) at 25℃.Seven fractions were used for the determinations and the experimental data fit either of the following equations: [η]=7.52×10~(-3)M~(0.96)ml/g M=200[η]-360 in the molecular weight range of 4,300-20,000.Phenol-acetic acid mixed solvent has the advantages of easy purification and causing no degradation of the polymer. Trace of water in the mixed solvent has negligible influence on the intrinsic viscosity of the polymer. The mixed solvent has good solvent property for nylon-6,nylon-66, nylon-7, nylon-9 and nylon-11 and is thus recommended as a universal one for the viscometry of polyamides.

    以苯酚为溶剂,甲醇为沉淀剂将三个聚壬酰胺试样(??各为20400,12900和7100)分级沉淀.每一试样至少经过二次分级,共得到二十级份.取其中七个级份测定其数均分子量及特性粘数.粘度测定在25℃,溶剂用苯酚-乙酸(2∶1重量比).在分子量4300-20000内,得到下列特性粘数-分子量关系: [η]=7.52×10~(-3)M~(0.96)ml/g M=200[η]-360 苯酚-乙酸(2∶1重量比)混合溶剂容易纯化且不引起聚壬酰胺的降解,能溶解尼龙-6,66,7,9和11,可作聚酰胺粘度测定的普适溶剂.

    Vinyl copolymers containing glycidyl methacrylate as one component are thermal reactive. They are valuable in preparing thermosetting and graft copolymers.When glycidyl methacrylate, methyl methacrylate, and methacrylic acid were copoly-merized, a linear copolymer was formed at first, which, on further heating at higher temperatures, was transformed into a crosslinked polymer. It was shown by IR spectro-scopy that intermolecular reaction of epoxy group and carboxyl group has taken place at the higher temperatures....

    Vinyl copolymers containing glycidyl methacrylate as one component are thermal reactive. They are valuable in preparing thermosetting and graft copolymers.When glycidyl methacrylate, methyl methacrylate, and methacrylic acid were copoly-merized, a linear copolymer was formed at first, which, on further heating at higher temperatures, was transformed into a crosslinked polymer. It was shown by IR spectro-scopy that intermolecular reaction of epoxy group and carboxyl group has taken place at the higher temperatures. Crosslinking of the copolymer chains raised the glass temperature appreciably.By heating the glycidyl methacrylate-methyl methacrylate copolymer with polycapro-lactam in benzyl alcohol solution, a graft copolymer was obtained. This graft copolymer, after being dried, could not be dissolved in most solvents including benzyl alcohol and m-cresol at room temperature, except the very polar ones, such as 98% formic acid. This abnormal behaviour was ascribed to the formation of H-bonds between molecular chains.Viscosities of both the back-bone copolymer and the graft copolymer in benzyl alcohol and in m-cresol were determined. It was shown that the Huggins constant k' increases owing to grafting in the case of m-cresol solution, but not in the case of benzyl alcohol solution. Therefore, the effect of grafting on the solution viscosity is not always the same as branching, because of the nature of the backbone and that of the graft being different, and hence the solvent effect on them is also different.

    含有甲基丙烯酸环氧丙酯的聚合物是热活性高分子,它们可以被用来合成体型共聚物或接枝共聚物。 当甲基丙烯酸环氧丙酯、甲基丙烯酸甲酯、和甲基丙烯酸三种单体一起进行共聚合时,首先得到一种綫型的共聚物。这种共聚物经过在120℃以上热处理,就转化成一种透明的体型的共聚物,红外光谱的研究证示,在热处理时分子链间的环氧基和羧基起了反应,交联的结果使共聚物的玻璃化温度由110℃左右提高到150℃左右。 把甲基丙磷酸环氧丙酯和甲基丙烯酸甲酯的共聚物与消去末端氨基的聚己内酰胺共溶于热的苯甲醇并150℃加热,可以得到一种接枝共聚物。这种接枝共聚物一旦析出并干燥以后,在常温下不溶于包括苯甲醇、间甲苯酚在内的大多数溶剂,但却易溶于极性较强的溶剂如98%的甲酸。这个反常的表现被认为是由于分子链间氢键作用所引起的。 作为骨干的甲基丙烯酸环氧丙酯和甲基丙烯酸甲酯共聚物及其聚己内酰胺的接枝共聚物在苯甲醇及在间甲苯酚中作了溶液粘度测定,在间甲苯酚溶液内,由于接枝,Huggins常数k′值增加了;但在苯甲醇溶液内,k′值却无甚变化。这说明由于主链和枝链化学性貭的不同,溶剂对它们的作用不一样,接枝对溶液粘度的影响不能和普通的枝化高分子等 ...

    含有甲基丙烯酸环氧丙酯的聚合物是热活性高分子,它们可以被用来合成体型共聚物或接枝共聚物。 当甲基丙烯酸环氧丙酯、甲基丙烯酸甲酯、和甲基丙烯酸三种单体一起进行共聚合时,首先得到一种綫型的共聚物。这种共聚物经过在120℃以上热处理,就转化成一种透明的体型的共聚物,红外光谱的研究证示,在热处理时分子链间的环氧基和羧基起了反应,交联的结果使共聚物的玻璃化温度由110℃左右提高到150℃左右。 把甲基丙磷酸环氧丙酯和甲基丙烯酸甲酯的共聚物与消去末端氨基的聚己内酰胺共溶于热的苯甲醇并150℃加热,可以得到一种接枝共聚物。这种接枝共聚物一旦析出并干燥以后,在常温下不溶于包括苯甲醇、间甲苯酚在内的大多数溶剂,但却易溶于极性较强的溶剂如98%的甲酸。这个反常的表现被认为是由于分子链间氢键作用所引起的。 作为骨干的甲基丙烯酸环氧丙酯和甲基丙烯酸甲酯共聚物及其聚己内酰胺的接枝共聚物在苯甲醇及在间甲苯酚中作了溶液粘度测定,在间甲苯酚溶液内,由于接枝,Huggins常数k′值增加了;但在苯甲醇溶液内,k′值却无甚变化。这说明由于主链和枝链化学性貭的不同,溶剂对它们的作用不一样,接枝对溶液粘度的影响不能和普通的枝化高分子等 量齐观。

     
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