A reduction of molar mass can result in a deterioration in properties, such as strength. This paper investigates the degradation of polymers during thermal spraying with special reference to the changes in molar mass.D. T. GawneY. Bao
However, for an almost compatible pair of polymers (i.e., interaction parameters g are only slightly larger than the critical values for UB = 0), this statement remains true only in the case of sufficiently small UB. In order to gain some understanding of these findings, calculations were ...
A noticeable difference concerns the signal intensities in the higher mass ranges (up to 1400 g mol-1), which corresponds to more branched and longer homologues of the polymers. Especially, a significantly more intensive signal of MMU was registered. The average molecular weight (MW) of the ...
The molar mass of the grafted polymers was estimated with gel permeation chromatography (GPC) using THF as eluent and polystyrene as a calibration standards. The GPC traces of PGA and grafted PGAs with stearic acid side chains, both stearic and behenic acid side chains, and both stearic and la...
This article describes the experimental conditions that should be applied to avoid molecular degradation in size-exclusion chromatography of polymers of ultra-high molar mass (weight-average molar mass M w>5000 kg/mol). The applicability of the optimized experimental conditions is demonstrated using pol...
Characterization of hemicellulose B from corn fiber by high-performance size exclusion chro- matography with on-line molar mass and visco... ML Fishman,LW Doner,HK Chau,... - 《International Journal of Polymer Analysis & Characterization》 被引量: 40发表: 2000年 Evaluation of on-line high-...
In linear polymers the individual polymer chains rarely have exactly the same degree of polymerization and molar mass, and there is always a distribution around an average value. The molar mass distribution in a polymer describes the relationship between the number of moles of each polymer species ...
In this paper, the overall molar mass of the poly- meric and particle concentration effects on ER fluids with strong ER response has been studied. The photo- functional poly("-caprolactone) polymers have been coded with letters A, B, C, and D according to their synthesis order.8 yTo whom...
J. Janca, `Micro-Channel Thermal Field-Flow Fractiona- tion: Analysis of Ultra-High Molar Mass Polymers and Colloidal Particles with Constant and Programmed Field Force Operation', J. Liq. Chromatogr. Rel. Technol., 25, 2173-2191 (2002)....
The tensile properties of the prepared materials are similar to the ones of synthetic polymers. The biodegradability, evaluated based on biochemical oxygen demand method, showed that biodegradability increases as the EVA molar mass increases. 展开 ...