Reference

Thermal behavior of conductive polymers and natural rubbers

Thermal behavior of conductive polymers and natural rubbers. Investigations with x-ray absorption spectroscopy. Winter, Ines (Mathematisch-Naturwissenschaftliche Fakultaet, Univ. Bonn, Bonn D-53115, Germany). Universitaet Bonn, Physikalisches Institut, [Technical Report] BONN-IR, BONN-IR-95-29, 1-126 (German) 1995. CODEN: UBPIEQ. ISSN: 0172-8741.Several substances with their cas registry numbers 68634-31-1 and 56706-10-6 may be metioned in this study. DOCUMENT TYPE: Report CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 39 The thermal aging of natural rubbers and modified polythiophene salts were investigated by x-ray absorption spectroscopy. XANES (x-ray absorption near edge structure) measurements at the S, P, and Cl K-edge were used to monitor chain modifications. The absorption spectra were compared with monomers and model compds. Thermal stress of thiophene polymers caused counter-ion degrdn. with increasing size of alkyl side chains. .

Production and application of silica loaded powder rubber based on E-SBR

Production and application of silica loaded powder rubber based on E-SBR. Goerl, Udo (Marl, Germany). Technical Papers - American Chemical Society, Rubber Division, [Fall Technical Program], 162nd, Pittsburgh, PA, United States, Oct. 8-11, 2002, 1297-1322. American Chemical Society, Rubber Division: Akron, Ohio. (English) 2002. CODEN: 69DXQZ. DOCUMENT TYPE: Conference; (computer optical disk) CA Section: 39 (Synthetic Elastomers and Natural Rubber) With the development of a silica-loaded free-flowing rubber/filler compd. system based on E-SBR it could be demonstrated that the powder rubber technol. can also be successfully used for white fillers. For this, the addn. of bi-functional sulfur-contg. organosilanes for rendering the silica surface hydrophobic plays a vital role. During drying of the powder rubber, a reaction between the filler and silane takes place with the evolution of ethanol whereby the presence of a completely silanized silica in the final product can be shown. Starting from a suitable raw material selection, a focal point of the paper is the manuf. and characterization of the products. Further, the handling of the products in today's internal mixer process is described and special attention is given to the quant. detn. of the compn. of the released waste gases. Finally, the in-rubber data are shown in comparison with the ref. compds. produced by conventional methods. In particular, studies for the redn. of the mixing time and no. of mixing stages and for blending of various PR products are presented and discussed.Except for chemicals metioned above, 40372-72-3 and 56706-10-6 are also used. .