至尊木虫 (知名作家)
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xpz-wdy: 金币+20, 翻译EPI+1, ★★★★★最佳答案, 非常感谢，非常有用 2015-09-30 06:12:46
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Abatract: This paper presents physico-mechanical properties of two faceblanks for gas masks. The results show that under the existing rubber formula and curing conditions, NR faceblank with a high self-inforceing possibility 【offerS】 tensile strength of 22.0MPa and tearing strength of 41.3KN∙m-1, higher than 【those offered by】 CIIR faceblank， which are 13.2MPa and 35.5KN∙m-1, respectively【原句比较的对象错误】. Resilience of the NR faceblank 【（60%）】 is much higher than 【that of CIIR faceblank】 which is 60% 【比较对象仍然错位】. Poor resilience of CIIR faceblank is due to the great internal friction 【which is可以删除】 originated from the dense side methyl groups in the 【predominant】 isobutylene units. After thermo-oxidative ageing at 100oC for 24 hours, both of the two rubbers increase approximately 2 【degree】 in shore hardness, and an increase of tensile strength, 【elongation】 and tearing strength of the NR faceblank 【is，时态前后一致】 observed, the 【elongation】 and tearing strength of the CIIR faceblank 【have时态前后一致】 shown a decreasing trend by contrast. Curing changes the 【original】 structure of rubbers, and makes the impacts of ageing on the physico-mechanical properties more complicated. |
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