کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5206339 | 1382305 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of ultra-low glass transition temperature via differential scanning calorimetry
ترجمه فارسی عنوان
تعیین دمای انتقال حرارت فوقالعاده کم از طریق کالریمتریابی اسکن کلیدی
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کلمات کلیدی
پلی اتیلن گلیکول)، انتقال شیشه، بلورین، ترکیب پلیمر، سازگاری،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
A novel method was developed to determine the ultra-low glass transition temperature (Tg) of materials through physical blending via differential scanning calorimetry. According to the Fox equation for polymer blends, a blend of two fully compatible polymers has only one Tg. The single Tg is a function of the Tgs of the two simple polymers. Thus, the ultra-low Tg of one material can be obtained from the Tgs of another polymer and their blends. The error of Tg measurements depends on the measurement error of the Tgs for the blends and another polymer. The method was successfully applied to determine the Tgs of acetyl tributyl citrate (ATBC), tributyl citrate (TBC) and poly(ethylene glycol)s (PEG)s with different molecular weights. The Tgs for ATBC, TBC, PEG-4000 and PEG-800 were â57.0 °C, â62.7 °C, â76.6 °C and â83.1 °C, respectively. For all the samples, the standard deviation of measurements was less than 3.3 °C, and the absolute error of measurements was theoretically not more than 5.3 °C. These results indicate that this method has acceptable precision and accuracy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 32, Issue 8, December 2013, Pages 1368-1372
Journal: Polymer Testing - Volume 32, Issue 8, December 2013, Pages 1368-1372
نویسندگان
Lidong Feng, Xinchao Bian, Gao Li, Zhiming Chen, Yi Cui, Xuesi Chen,