Molecular Weight of Substances Definition and molecular weight (molar mass) of some common substances. The molecular weight of a substance, also called the molar mass , M, is the mass of 1 mole of that substance, given in M gram. In the SI system the unit of M is [kg/kmol] and in...
m‐XyleneOrganic SolventsOxidative SpeciesDermal absorption of organic solvents, such as m-xylene, can lead to skin inflammation and pathological changes within hours after exposure. This study detected oxidative species formation and low molecular weight (LMW) DNA in rat skin as potential indicators ...
Size exclusion chromatography (SEC) was used to characterize the molecular weight distribution (MWD) of 6 low density and 6 high density food grade polyethylene resins. The hexane and xylene extractable fractions of these 12 resins were also analyzed by SEC. An IBM 370/168 computer with an APL...
We report in this paper the transport of an aromatic solvent, xylene through palm pressed fibre filled low density polyethylene composites studied at three different temperatures (40, 60, and 80 A degrees C) by conventional weight-gain method. The diffusion parameters were investigated with special...
Hiroki Ogawa1,3, Rintaro Inoue1,4, Koji Nishida1, Go Matsuba5, Noboru Ohta3, Shin-ichi Takata6, Taiki Tominaga7, Jun-ichi Suzuki7, Young-Soo Han8 and Tae-Hwan Kim8 The role of molecular weight during shish-kebab formation is an important issue in flow-induced polymer crystallization. ...
M. 2.65 2.86 2.83 2.10 1.83 Polym. J., Vol. 29, No. 2, 1997 Synthesis of High Molecular Weight Polymers Using Phosphine Initiator Table II. Effects of solvents on polymerization" Entry 1 2 3 4 5 6 7 8 9 IO 11 12 Solvent DMF Diglyme Chlorobenzene Toluene CC14 Xylene Acetonitrile ...
K Shirayama,Shin-ichiro Kita,M Kakugo 摘要: On some typical commercial high pressure polyethylenes, [η] (145°C, dioctyl adipate) was measured, and assuming them as [η] θ, the expansion factors (α3η≡ [η] (75°C, xylene) / [η] θ) were determined. Vessel-type polyethylenes...
Polymerizations were initially carried out by adding potassium tert-butoxide to monomer in the presence of a chain transfer agent, anthracene. Anthracene showed little effect on the molecular weight of the resulting polymer, suggesting that the major polymerization route was not radically initiated. ...
Douglas,M.,Ruthven,Bal,K.,Kaul 摘要: Experimental equilibrium isotherms, Henry's law constants, and heats of sorption are reported for n-hexane, benzene, toluene, p-xylene, mesitylene, naphthalene, trimethylbenzene (TMP), and hexamethylbenzene (HMB) in La-exchanged zeolite Y (Si/Al = 1.8)...
作者: M. Nali & A. Manclossi 摘要: The problem concerning the determination of asphaltene molecular weight has been critically investigated. A size exclusion chromatography (SEC) analytical method has been developed using innovative calibration standards. The obtained results have been compared with ...