التفاصيل البيبلوغرافية
| العنوان: |
Strain Rate Dependence of Stretch-Induced Crystallization and Crystal Transition of Poly(dimethylsiloxane) |
| المؤلفون: |
Jingyun Zhao (557705), Shengyao Feng (11473781), Wenwen Zhang (331647), Wei Chen (23863), Junfang Sheng (11473784), Wancheng Yu (2174185), Liangbin Li (1313925) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biotechnology, Ecology, Cancer, Astronomical and Space Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, following two aspects, high strain rates, different strain rates, strain rate dependence, higher strain rate, four crystal forms, specific crystal form, network strands formed, low strain rates, strain rates, strain rate, network strands, crystal formed, form appears, crystal transition, − 35, wide range, tilt degree, thermodynamic factors, studied via, strong adaptability, spatial distributions, ray scattering |
| الوصف: |
The stretch-induced crystallization (SIC) and crystal transition (SCT) of silica-reinforced poly(dimethylsiloxane) (PDMS) in parameter spaces of strain rate (from 0.002 to 2 s –1 ) and temperature (from ca. −35 to −75 °C) have been studied via in situ synchrotron radiation wide-angle X-ray scattering. Nonequilibrium SIC/SCT diagrams in the strain rate–temperature space have been established. The effects of the strain rate on the SIC/SCT are mainly manifested on the following two aspects. First, stretching of PDMS at different strain rates can induce the formation of four different crystal forms β ’ , β, α ’ , and α. The specific crystal form during the SIC has shown to be determined by the competition between the kinetic and thermodynamic factors. A higher strain rate and temperature are favorable for the formation of kinetically stable crystal forms α ’ and α. While at low strain rates and temperatures, the thermodynamically stable forms β ’ and β are preferred. Second, among the four crystal forms, the α ’ form appears over a wide range of strain rates and temperatures because of its strong adaptability to the stretching field. For the α ’ crystal formed during the SIC, the strain rate can regulate the crystallite size, the tilt degree of chains in the crystal, and also the spatial distributions of crystals and network strands. We have found that the critical stress to trigger the SCT of α ’ –α and the state of network strands at the onset of the SCT are closely associated with the microstructural features of crystals and network strands formed in the preceding SIC. Three simplified mechanical models have been proposed to clarify the SCT mechanisms of α ’ –α at the low, moderate, and high strain rates. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Strain_Rate_Dependence_of_Stretch-Induced_Crystallization_and_Crystal_Transition_of_Poly_dimethylsiloxane_/16673951 |
| DOI: |
10.1021/acs.macromol.1c01407.s001 |
| الاتاحة: |
https://doi.org/10.1021/acs.macromol.1c01407.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.BCADD8C3 |
| قاعدة البيانات: |
BASE |