The high molecular weight polyacrylamide (PAM) was synthesized in aqueous solution and the effects of initiator, polymerization temperature and pH on the conversion and the weight average molecular weight were discussed.
用水溶液聚合法合成了高相对分子质量的聚丙烯酰胺 (PAM ) ,并讨论了引发体系、温度和 pH值对反应转化率和PAM重均分子量的影响。
Although lots studies on flocculation have been reported, based on our knowledge, the structure, size & size distribution, the weight average molecular weight of the particle of flocculation in pure water haven't been investigated yet.
激光散射技术因其具有可准确、快捷及不干扰弥散物质在水中自然状况的优点，在对分散系统的测定研究中得到重要应用，本文将激光散射的技术和方法应用于絮凝剂分子特性参数的研究，首次得出了三种絮凝剂在纯水中自然状况下的有关特性参数，测定了其重均分子量Mw、流体力学半径A_h、回转半径A_g及其粒度分布等参数，并通过流体力学半径与回转半径的比值a确定出絮凝剂颗粒在水中自然状态下的形态结构。
OBJECTIVE HPLC was used in the weight average molecular weight of Hydroxyethyl Starch 200/0.
5注射液的重均分子量与分子量分布。
In this paper,the influence of molecular weight(Mw) of modified PASP(Asp-Glu copolymer,PAG) on its scale inhibition is studied,and the optimum molecular weight are determined;moreover,the scale inhibition performance of combinated copolymer with different Mw is also tested.
考察了聚天冬氨酸(PASP)的改性产物——天冬氨酸-谷氨酸(Asp-Glu)共聚物的分子量对阻垢性能的影响,确定了共聚物的最佳重均分子量;并考察了两种不同分子量共聚物复配使用的阻垢效果。
Although GPC online viscometer, as a kind of GPC equipped with a concentration detector and a viscometer, has been used widely as its brief manner, its results of molecular number, molecular weight and dispersibility retain a lot of errors with the problems of the data applied method and the precision of instrument.
黏度在线凝胶色谱是一种同时配备浓度和黏度检测器的凝胶色谱,由于其测定过程简单直接,被越来越多地广泛采用,但因为数据处理方式和仪器精度的问题,其数均分子量、重均分子量与分散度结果存在较大误差。
The weight average molecular weight, the diffusion coefficient, both the hydrodynamic and gyration radii, and the shape of the flocculation particles can be determined by laser light scattering.
综述了利用该技术可实现对絮凝剂胶体分子粒径、形态结构、粒径分布和重均分子量的精确测量 ,论述了激光散射技术在絮凝剂沉降性能的研究及絮凝剂改进提高方面的重要作
There existed a close dependence of MI on number-average molecular distribution (Mn), weight-average molecular weight (Mw) and viscosity-average molecular weight distribution (Mv), respectively.
研究了聚丙烯(PP)的熔体流动指数(MI)与聚合物不同分子量之间的关联性,对于分子量分布较窄的PP,数均分子量(Mn)、重均分子量(Mw)和粘均分子量(Mv)均能较好的关联;反之,MI与Mn关联性下降,而MI与Mw和Mv的关联性仍很好,尤其是MI与Mv的关联性受分子量分布的影响很小;MI与Z均分子量的关联性很差。
The correlation between weight average molecular mass and intrinsic viscosity was established.
采用外推法和一点法测定PTT特性粘度 ,结果表明采用一点法操作较简单 ,并拟合出重均分子质量与特性粘度之间关系式。
The hydrolytic properties of linear and 1 ,2,4-butanetriol-grafted polybutylene succinate (PBS) were studied based on the change in weight average molecular weight (Mw) , melting point and surface morphology.
从重均相对分子质量(Mw)、熔点以及表面形态的变化,研究了线形和通过1,2,4-丁三醇枝化改性的聚丁二酸丁二醇酯(PBS)的水解性能。
Aim:To prepare chitosans with different weight average molecular weights ( W) and free amino- group contents, and to develop the method for determining W of chitosans using laser light scattering technique.
目的 :制备出不同 -NH2 质量分数和不同重均相对分子质量的精细壳聚糖制品 ,利用激光散射仪测定在不同脱乙酰条件下所获得的壳聚糖重均相对分子质量 。
Determination of weight-average molecular weight of polystyrene standards by low angle laser light scattering method
GB/T6598-1986小角激光光散射法测定聚苯乙烯标准样品的重均分子量
Weight average molecular weight of Hydroxyethyl Starch 200/0.5 and Sodium Chloride Injection by HPLC
HPLC法测定羟乙基淀粉氯化钠200/0.5注射液的重均分子量
To apportion(weight)evenly, as over a door.
将重量平均分配平均分布重量，如门上的
Stand with your legs apart and your weight evenly distributed.
双腿分开站立，平均分散身体的重量。
Two Calculations of Average Energy of Rigid Double-Atom Molecule;
刚性双原子分子平均能量的两种求法
A quantum number equal to twice the average electric charge of a particle multiplet or, equivalently, to the sum of the strangeness and the baryon number.
超荷一个量子量，等于一个粒子多重线谱的平均电极；或者相当于量子数和重子的数量的总和
Regulating Molecular Weight of Homopolymer of DMDAAC by Chain-transfer Agent
链转移剂调控DMDAAC均聚物分子量
It is important to get even distribution of water and good penetration.
灌水时水量均匀分布和充分渗透是很重要的。
The antigens were found to be homogenious and have a molecular weight of 87000 dalton asdetermined by gel-electrophoresis method.
电泳分析得全抗原分子量平均为87000道尔顿。
Study on average molecular weights of the distillated fractions from different coal-derived oils
煤液化生成油窄馏分平均分子量的研究
Mol anlar weight is express in the same unit as atomic weight.
分子的重量和原子的重量用相同的单位表示。
What is the balance weight of this driver?
哪一个是最均衡的重量?
Relational Expression of Average Molecular Weight of Alkyd Resin with Degree of Reaction
醇酸树脂数均分子量与反应程度的关系
Determination of number average molecular mass of chitosan-oligosaccharide by acetylacetone method
乙酰丙酮法测定甲壳胺寡糖数均分子量
On Characteristics of Light Scattering by Inhomogeneous Particles and Measurement of Refractive Index Profile;
非均匀粒子光散射特性及折射率分布测量研究
Discussion on Experimental Process of Determining Viscosity-average Molecular Weight of UHMWPE by Viscosity Method
黏度法测试UHMWPE黏均分子量实验过程探讨
Of or relating to an isotope with an atomic mass greater than the average mass of that element.
重的原子质量比该元素的平均原子质量重的同位素的或与之有关的
The analysis of the molecular weight and amido content of oligochitosan prepared by two methods
两种方法制备壳寡糖平均分子质量与氨基含量分析