Phenomenon of room temperature interdiffusion self-bonding between entangled glassy polymers: a statistical study
Guardado en:
| Publicado en: | Colloid & Polymer Science vol. 303, no. 1 (Jan 2025), p. 129 |
|---|---|
| Publicado: |
Springer Nature B.V.
|
| Materias: | |
| Acceso en línea: | Citation/Abstract Full Text - PDF |
| Etiquetas: |
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Resumen: | A comprehensive statistical analysis of the distributions of the adhesion strength (σ) developed during a long-term contact (up to 2 months) of two identical specimens of an amorphous entangled polymer at a very low temperature (T) of 24 °C with respect to the bulk glass transition temperature (Tg), below Tg by 80 °C, was carried out. For this purpose, two representative glassy polymers, polystyrene [PS; three PSs differing markedly in the number-average molecular weight (Mn) from 75 to 966 kg/mol] and poly(methyl methacrylate) (PMMA; Mn = 43.5 kg/mol), were selected. Keeping in contact the two specimens of PS or PMMA at T = 24 °C resulted in self-bonding at PS–PS and PMMA–PMMA interfaces. The as-self-bonded interfaces were shear fractured in tension to measure their σ values. The four σ distribution sets obtained for such a low T for the first time were examined using a number of common formal tests for normality and graphical statistical methods, including Weibull’s model. In general, the σ distributions for the PS with the highest Mn = 966 kg/mol were described more correctly than those for the other three polymers, regardless of the statistical methods applied. These results were compared with those obtained after self-bonding at a significantly higher T = Tg − 33 °C for the same polymers. The statistical parameters estimated at markedly different temperatures (T = Tg − 80 °C and Tg − 33 °C) were compared and discussed. |
|---|---|
| ISSN: | 0303-402X 1435-1536 0023-2904 0368-6590 |
| DOI: | 10.1007/s00396-024-05338-8 |
| Fuente: | Materials Science Database |