Download e-book for kindle: Ageing of Rubber & Accelerated Heat Ageing Test Results by Brown, Roger P.

By Brown, Roger P.

ISBN-10: 185957274X

ISBN-13: 9781859572740

ISBN-10: 1859573487

ISBN-13: 9781859573488

This document is an output from the Weathering of Elastomers and Sealants undertaking, which varieties a part of the united kingdom government’s division of alternate and Industry’s Degradation of fabrics in competitive Environments Programme.

A long term typical aging programme used to be all started in 1958 while 19 rubber compounds have been uncovered at three destinations. the ultimate units of attempt items have been withdrawn in 1998 giving a complete of forty years of normal getting old. the result of the actual exams performed at periods over the interval have been released in 2000 through Rapra in 'Natural getting old of Rubber—Changes in actual houses over forty Years'.

This record information the result of speeded up warmth getting older experiences undertaken on re-mixed samples of these fabrics studied for the average getting old research and at the 20 new compounds selected to symbolize polymers no longer on hand in 1958 and to mirror alterations in compounding perform.

In addition to these homes studied for the substitute weathering exposures, compression set and dynamic homes have been additionally measured.

The result of a majority of these checks are back offered graphically and tabulated, permitting the speed of decay of homes to be undefined. because the variety of graphs are too voluminous to be reproduced in overall, these for hardness, tensile power, elongation at holiday and a hundred% modulus are given.

Extrapolation of the sped up effects to longer occasions at reduce temperatures used to be tried by way of techniques – the Arrhenius relation and the WLF equation – and compression set effects analysed utilizing a dose fee equation. Predictions are made for swap at 230C and 400C to equate to long term typical aging below temperate and scorching dry stipulations.

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Additional resources for Ageing of Rubber & Accelerated Heat Ageing Test Results

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5' @ 165 °C FEF N550 Black 40 DBP 5 Stearic Acid 1 Dicup 40C 3 Rhenogran TAC50 2 32 Ageing of Rubber - Accelerated Heat Ageing Test Results Participants’ Compounds Participants' Compounds Details of most of the formulations are not disclosed. Compound P1 Blend of two EPDM copolymers, one with high ethylene content and medium Mooney viscosity, the other with medium ethylene content and low Mooney viscosity. Contains carbon black, zinc oxide, TMQ, paraffinic process oil, dicumyl peroxide and a sulphur donor.

5' @ 141 °C black loading, sulphur, TMTD, CBS and stabilised. Details confidential. 5' @ 165 °C FEF N550 Black 40 DBP 5 Stearic Acid 1 Dicup 40C 3 Rhenogran TAC50 2 32 Ageing of Rubber - Accelerated Heat Ageing Test Results Participants’ Compounds Participants' Compounds Details of most of the formulations are not disclosed. Compound P1 Blend of two EPDM copolymers, one with high ethylene content and medium Mooney viscosity, the other with medium ethylene content and low Mooney viscosity. Contains carbon black, zinc oxide, TMQ, paraffinic process oil, dicumyl peroxide and a sulphur donor.

Contains carbon black, zinc oxide, TMQ, paraffinic process oil, dicumyl peroxide and a sulphur donor.

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Ageing of Rubber & Accelerated Heat Ageing Test Results by Brown, Roger P.


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