mckinn77

過去十年來質子交換膜燃料電池(PEMFC)朝向商業化已經有了長足的進步。然而還是有許多技術問題，例如燃料電池裡的水管裡和觸媒中毒，該被處理以實現質子交換膜燃料電池(PEMFC)的商業化。在100° C以上運轉質子交換膜燃料電池(PEMFC)被提出可能是上述若干問題的理想解決方案。高溫下質子交換膜燃料電池(PEMFC)的運作不止有助於改善陰極動力學狀態同時也提昇觸媒對污染的耐受度。再者，高溫運轉下燃料電池的氣體傳輸、水管理跟殘熱管理也獲得改善。由於這些好處，過去這些年高溫質子交換膜燃料電池(PEMFC)被廣泛的研究。

過去十年來質子交換膜燃料電池(PEMFC)朝向商業化已經有了長足的進步。然而還是有許多技術問題，例如燃料電池裡的水管裡和觸媒中毒，該被處理以實現質子交換膜燃料電池(PEMFC)的商業化。在100° C以上運轉質子交換膜燃料電池(PEMFC)被提出可能是上述若干問題的理想解決方案。高溫下質子交換膜燃料電池(PEMFC)的運作不止有助於改善陰極動力學狀態同時也提昇觸媒對污染的耐受度。再者，高溫運轉下燃料電池的氣體傳輸、水管理跟殘熱管理也獲得改善。由於這些好處，過去這些年高溫質子交換膜燃料電池(PEMFC)被廣泛的研究。

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. 

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.