Effect of Super-structure in Polypropylene Film during Extension process

• Main Authors: Chung-Cheng Su, 蘇忠誠
• Other Authors: Ren-Haw Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/54482699942065739892

碩士 === 國立交通大學 === 機械工程學系 === 100 === The super-structure in polymer can seriously affect products properties, and thus investigating super-structure properties is the key to improving polymer film quality. Polypropylene film was used to examine the effect of different extension temperature, extension speed and extension rate during polymer film extension process. This study use a lab developed extension device that can change the extension temperature, extension speed and extension rate, and observed the super-structure in polymer film using polarizing optical microscope and scanning electron microscope. The experiment shows that polypropylene film exhibits similar kite-shaped and damaged structure during extension process, and the extension temperature and extension rate impact the uniformity of kite-shaped and damaged structure, the structure of polymer film is more uniform under increasing extension temperature .The shape of kite-shaped structures are larger, longer and thinner under high extension rate; on the other hand, the effect of extension speed on polymer structure is not obvious during polymer film extension.