Z. Zhang, "Control of molecular weight in tetrahydrofuran polymerization initiated by het- eropolyacid," Journal of Applied Polymer Science, vol. 82, no. 2, pp. 269-275, 2001.Y. Chen,G.L. Zhang,H.Z. Zhang.Control of molecular weight in tetrahydrofuran polymerization initiated by ...
ASTM D5296 Standard Test Method for Molecular Weight Averages and Molecular Weight Distribution of Polystyrene by High Performance Size-Exclusion ChromatographyISO 13885-1 Binders for Paints and Varnishes -- Gel Permeation Chromatography (GPC) -- Part 1: Tetrahydrofuran (THF) as Eluent...
The molecular weight of self-made PVB was measured by Gel permeation chromatography (GPC), in which tetrahydrofuran and polystyrene were selected as the test solvent and the standard sample respectively. The mass average molecular weight (Mw) was tested as 68.696 kg·mol−1 with polydispersity in...
Preparation of Narrow-Molecular-Weight-Distribution Poly(tetrahydrofuran) The preparation method for the monodisperse crystallizable polymer, poly(tetrahydrofuran), was studied over a wide range of molecular weights. Bulk polymer... R Fujmoo,M Kawahash,M Naasawa,... - 《Polymer Journal》 被引量:...
Preparation of Narrow Molecular Weight Distribution Poly(tetrahydrofuran), Fujimoto, Kawahashi, Nagasawa and Takahashi, Polymer J., vol. 11, No. 3, 1979.Preparation of Narrow-Molecular-Weight-Distribution Poly(tetrahydrofuran), " Fujimoto, Kawahashi, Nagasawa and Takahashi, Polymer J., vol. 11, ...
A method is described for solubilizing these materials using trichloroacetic acid, such that molecular weight distribution can be measured using a normal gel permeation chromatography system with μ-Styragel columns and tetrahydrofuran as solvent.关键词: Phenol—formaldehyde resols molecular weight ...
After extraction with acetonitrile (AN) and tetrahydrofuran (THF), PAn shows a unimodal MW distribution. The Mn and Mw of PAn synthesised with AP and FC are: 9,900, 50,700 and 13,500, 55,300, respectively. The intensity-weighted particle size distribution (PSD I ) determined by DLS in...
The molecular weights of aquatic fulvic acids extracted from five rivers were determined by vapor pressure osmometry with water and tetrahydrofuran as solvents. The values obtained ranged from 500 to 950 dallons, indicating that the molecular weights of aquatic fulvic acids are not as great as has...
US5208385 Feb 19, 1992 May 4, 1993 Arco Chemical Technology, L.P. Preparation of tetrahydrofuran polymers having a narrow molecular weight distribution using an amorphous silica-alumina catalystKahn.Preparation of tetrahydrofuran polymers having a narrow molecular weight distribution using an amorphous ...
2). The UNP method is easy to operate and demands small quantities of material, making it well suited for high-throughput batch screening, and for other applications beyond photocatalysis. Briefly, the donor and acceptor molecules were dissolved in tetrahydrofuran (THF) solution, and then injected...