کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5201130 | 1502884 | 2016 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transparent blown films from poly(lactide) and poly(ethylene-co-vinyl acetate) compounds: Structure and property
ترجمه فارسی عنوان
فیلم های ضخیم شفاف از ترکیبات پلی (لاکتید) و پلی (اتیلن و وینیل استات): ساختار و اموال
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کلمات کلیدی
پلی (لاکتید)، فیلم ضرب و شتم، اموال آنیزوتروپیک، حساسیت نکته، مرفولوژی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
The application range of poly(lactide), PLA, films is limited due to the brittleness and notch-sensitivity. In this work, thin films with balanced properties were fabricated by melt blowing of PLA and poly(ethylene-co-vinyl acetate) (EVA) blends. The film thickness is dependent on the taken-up speed and reached to around 10 μm at the taken-up speed over 14 m/min. The presence of EVA not only significantly enhanced the tensile toughness and notch-resistance of the PLA films but also retained high transmittance. The films exhibited anisotropic mechanical performances which were correlated to the micro-morphology differences between the take-up direction (DD) and the transversal direction (TD) as characterized by atomic force microscope. In addition, the EVA with 80 wt% VA units showed better overall modification effect on the PLA films than the EVA with 60 wt% VA units. Superior mechanical properties of PLA/EVA (80/20) blends such as tensile strength of 50-60 MPa, elongation at break up to 230% and tear strength of 85 kN/m were achieved in the DD direction. Meanwhile, balanced properties were also achieved in TD direction. Moreover, a transmittance of around 90% was obtained for the PLA/EVA films which are comparable to neat PLA films. A high enough VA unit content is crucial for superior mechanical properties and high transparency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 129, July 2016, Pages 328-337
Journal: Polymer Degradation and Stability - Volume 129, July 2016, Pages 328-337
نویسندگان
Pengwu Xu, Piming Ma, Martin Hoch, Eric Arnoldi, Xiaoxia Cai, Weifu Dong, Mingqing Chen,