close

Textile and industrial fibers respond to the environment according to their chemical composition and microstructure. Since fibers are typically semi-crystalline, they are generally more stable to both chemical attack and temperature then are wholly amorphous linear polymers. Polymer fibers are very good; indeed, they are the material of choice in some applications, yet they perform poorly in other environment. For example, polyolefins are virtually inert to inorganic, making polyolefin fibers useful as battery separator; however, polyolefins, like most other polymers, do not resist degradation in ultraviolet light. Consequently, polyolefin tent fabric is stabilized so that it can tolerate long exposures to sunlight. We will probe into the cause of poor ultraviolet stability in polymers and discuss ways to stabilize fibers. 

 

紡織及工業纖維依據其組成和微觀結構對環境產生(不同的)反應。因為纖維一般都是半結晶體,所以它們對於化學侵蝕和溫度通常較完全非結晶線性聚合物更為安定。聚合物纖維非常優異:事實上,雖然它們是許多應用上所選擇的材料,但是在其他環境上卻表現不佳。例如,聚烯烴對於無機物幾乎完全惰性,使得它作為電池隔板相當好用;然而,聚烯烴就像其他聚合物一樣,無法抵抗紫外線照射下的裂解。因此,對聚烯烴帳篷纖維加以安定化使得它可以承受長時間的陽光照射。我們將探究聚合物紫外安定性不良的原因並討論纖維安定化的方法。

 

說明:

  1. polymer:聚合物,又稱高分子。
  2. then are是否為than才對?
  3. 粗體字為錯漏字更正。
arrow
arrow
    全站熱搜
    創作者介紹
    創作者 catherine50 的頭像
    catherine50

    catherine50

    catherine50 發表在 痞客邦 留言(0) 人氣()