The number-average molecular mass of a polymeric material has been determined by pyrolysis–gas chromatography (Py–GC) via end-group analysis. The major advantage of this technique is that no sample preparation is required. The sample is not required to be in the dilute solution form, and ...
viscosity average molecular weight 粘均分子量 number average molar mass 【化】 数均分子量 Z average molecular weight 【化】 Z均分子量 viscosity average molecular weight 粘度平均分子量 相似单词 Weight n. 重,重量,体重,砝码,重担,重大,影响,力量,势力 vt. 加重量于,压迫,使加权 weight n. ...
- Number Average Molecular Mass (M_n) = 30,000 2. Substitute the values into the formula: PDI=MmMn=40,00030,000 3. Perform the division: PDI=40,00030,000=43≈1.33 4. Interpret the result: The polydispersity index (PDI) is approximately 1.33. This indicates that the polymer has a dis...
The number of average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40,000. They poly dispersity of the polymer is:
linkages, a reducing sugar content of less than 20%, a polymolecularity index of less than 5, and a number-average molecular mass Mn at most equal to 4500 g/mol and a reducing sugar content of between 2% and 5%, and a number-average molecular mass Mn of between 2000 and 3000 g/mol...
Journal2012, International Journal of Heat and Mass Transfer Rehena Nasrin, ... Ali J. Chamkha 2.3 Average Nusselt number The average Nusselt number (Nu) is expected to depend on a number of factors such as thermal conductivity, heat capacitance, viscosity, flow structure of nanofluids, volume...
摘要: We became aware, in the course of our on-going research, that the number-average molecular weight of poly(1,4-trans isoprene) determined by convention…关键词: Polyisoprene SEC Mark Houwink Molecular weight determination DOI: 10.1016/j.polymertesting.2008.09.010 被引量: 13 ...
Calculate the sum of the product of the number of molecules (Ni) and the mass of each molecule (Mi) for all data points. Step 1 Calculate the molecular weight (number average). MW―n=f1+f2+f3+f4f1M1+f2M2+f3M3+f4M4=0.20+0.30+0.30+0.200.20...
3) number-average molecular weight 数均分子量 1. The intrinsic viscosity was measured by Ubbelohde Viscometer and the number-average molecular weight was determined by Vapor Permeation Osmeter (VPO). 通过测定含侧氨基聚二甲基硅氧烷聚合物的数均分子量和特性粘数,对MHS方程中的常数K和α进行了订正,...
molecular weight chemistry Print Also known as: molecular mass, relative molecular mass Written and fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on...