کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5206080 | 1502947 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanoindentation creep of nonlinear viscoelastic polypropylene
ترجمه فارسی عنوان
خزش نااطائی ناپذیر پلی پروپیلن ویسکوزیته غیر خطی
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کلمات کلیدی
ناهمگونی غیرخطی، انطباق خزش نانو انداختن، پلی پروپیلن،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Uniaxial tensile creep tests at various applied stresses were carried out to demonstrate that PP is nonlinear viscoelastic. A novel phenomenological model consisting of springs, dashpots, stress-locks and sliders was proposed to describe the nonlinear viscoelasticity. Indentation creep tests at different applied load levels were also performed on nonlinear viscoelastic PP. It was found that the shear creep compliance varies with the applied load level when the applied load is less than 5Â mN, which means the indentation creep behavior was nonlinear. To find the real reason for the nonlinearity in indentation creep tests, the elastic modulus at various indentation depths was measured using continuous stiffness measurements (CSM). By analyzing the variation of elastic modulus with indentation depth, the nonlinearity of indentation creep behavior was proved to be caused by the non-uniform properties in the surface of the specimen rather than nonlinear viscoelasticity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 43, May 2015, Pages 38-43
Journal: Polymer Testing - Volume 43, May 2015, Pages 38-43
نویسندگان
Guangjian Peng, Yi Ma, Yihui Feng, Yong Huan, Chunjie Qin, Taihua Zhang,