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亻若煙云銀蟲 (小有名氣)
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[求助]
緊急求助翻譯
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| 聚甲醛（POM）是一種綜合性能較優(yōu)異的自潤滑材料，是五大通用工程塑料之一。聚甲醛不但具備優(yōu)異的機(jī)械性能和耐腐蝕性，而且其比剛度與比強(qiáng)度靠近金屬材料。因?yàn)槠洫?dú)特的性能，已經(jīng)被廣泛應(yīng)用于精密機(jī)械，汽車，機(jī)床，電子等領(lǐng)域代替有色金屬。但聚甲醛的摩擦系數(shù)比較高，耐高溫性能差，缺口敏感性高，沖擊韌性低，由于這些缺陷導(dǎo)致聚甲醛在每個(gè)方面中應(yīng)用受到了巨大的限定。聚四氟乙烯是一種摩擦系數(shù)小，化學(xué)穩(wěn)定性好，具有優(yōu)異的高溫穩(wěn)定性的填充材料。為了進(jìn)一步提高工程塑料聚甲醛的摩擦磨損性能，添加摩擦系數(shù)較低的結(jié)晶性高分子材料聚四氟乙烯，從而擴(kuò)展其應(yīng)用領(lǐng)域。本研究對(duì)聚四氟乙烯經(jīng)電子輻照系統(tǒng)輻照，機(jī)械粉碎，氣流粉碎處理，得到粒度小于10微米的聚四氟乙烯微粉。通過輻照降低聚四氟乙烯的分子量，改善其和聚甲醛之間的相容性。 |
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求調(diào)劑，一志愿:南京航空航天大學(xué)大學(xué) ，080500材料科學(xué)與工程學(xué)碩，總分289分
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2樓2016-05-18 21:53:51
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
亻若煙云: 金幣+150, 翻譯EPI+1, ★★★★★最佳答案 2016-05-19 13:59:51
亻若煙云: 回帖置頂 2016-05-19 17:51:43
亻若煙云: 金幣+150, 翻譯EPI+1, ★★★★★最佳答案 2016-05-19 13:59:51
亻若煙云: 回帖置頂 2016-05-19 17:51:43
| POM is a kind of self-lubrication material with the excellent comprehensive performance, which is one of five general engineering plastics. POM not only have the excellent mechanical properties and corrosion resistance,but also its specific stiffness and specific strength are closed to metal material. Due to the unique properties, POM has been widely used in the field of precision machinery, automobile, machine tools, electronics and so on instead of nonferrous metals. But because of some defects like relatively high friction coefficient, bad thermostable performance, high notch sensitivity, low impact toughness, application of POM in every aspect is limited greatly. PTFE is a kind of filling material with the low friction coefficient, good chemical resistance and excellent high temperature stability. In order to further improve the friction and wear properties of POM, adding a crystalline polymer material-PTFE with low friction coefficient can extend its application field. In this study, PTFE is irradiated by electron irradiation system, and treated with mechanical disintegration and fluid energy milling, and then PTFE micropowders can be got, whose particle size is less than 10 microns. Consistency between PTFE and POM can be improved by reducing the molecular weight of PTFE through irradiation. |
3樓2016-05-19 09:58:18
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