کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5178109 1502487 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural origin of fast yielding-strain hardening transition in fluoroelastomer F2314
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Structural origin of fast yielding-strain hardening transition in fluoroelastomer F2314
چکیده انگلیسی


- Mechanical response of fluoroelastomer F2314 shows fast transition from yielding to strain hardening.
- Unusual yielding results from destruction of CTFE-domains.
- Fast strain hardening is related to formation of fibril crystal.
- Destruction of CTFE-domains and formation of fibril crystal is origin of mechanical response.

The mechanical response of fluoroelastomer F2314 under uniaxial extension and its relation with strain-induced structural change are investigated by mechanical analysis, in-situ small angle X-ray scattering (SAXS) and wide angle X-ray scattering (WAXS). Yielding of samples followed by strain hardening is found without necking. Meanwhile, the strain range of strain softening is short, which is 0.77 at 25 °C and 0.3 at 60 °C. Microscopically, solution-cast F2314 shows microphase separation and low crystallinity. Results of WAXS and SAXS indicate strain-induced formation of fibrillar crystal during strain hardening. Based on these findings, it is supposed that the fast relay between destruction of microphase separated domains and formation of fibrillar crystal is the origin of the unique mechanical response.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 119, 16 June 2017, Pages 107-111
نویسندگان
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