Impact of Crystallization on the Development of Statistical Self-Bonding Strength at Initially Amorphous Polymer–Polymer Interfaces
To investigate the mechanisms of the adhesion (self-bonding) strength (<i>σ</i>) development during the early stages of self-healing of polymer–polymer interfaces and fracture thereof, it is useful to operate not only with the average <i>σ</i> value but with the <i>σ<...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/21/4519 |
| _version_ | 1797466755784769536 |
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| author | Yuri M. Boiko |
| author_facet | Yuri M. Boiko |
| author_sort | Yuri M. Boiko |
| collection | DOAJ |
| description | To investigate the mechanisms of the adhesion (self-bonding) strength (<i>σ</i>) development during the early stages of self-healing of polymer–polymer interfaces and fracture thereof, it is useful to operate not only with the average <i>σ</i> value but with the <i>σ</i> distribution as well. The latter has been shown to obey Weibull’s statistics for such interfaces. However, whether it can also follow the most widely used normal (Gaussian) distribution is currently unclear. Moreover, a more complicated self-healing case, when the <i>σ</i> development at an initially amorphous interface is accompanied by its crystallization, has not been investigated yet in this respect. In order to address these two important issues, 10 pairs of amorphous poly(ethylene terephthalate) (PET) samples were kept in contact for various periods of time from 5 min to 15 h at a temperature (<i>T</i>) of 94 °C (preserving the amorphous state) or <i>T</i> = 150 °C (giving rise to cold crystallization), or both <i>T</i>s. Thereafter, the as-formed amorphous and semi-crystalline PET–PET auto-adhesive joints were shear fractured in tension at ambient temperature. For the first time, the statistical distributions of a number of the measured <i>σ</i> data sets were analyzed and discussed using both Weibull’s and the Gaussian model, including several normality tests. |
| first_indexed | 2024-03-09T18:43:18Z |
| format | Article |
| id | doaj.art-9947c893c0c242738036a82680c38963 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T18:43:18Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-9947c893c0c242738036a82680c389632023-11-24T06:27:35ZengMDPI AGPolymers2073-43602022-10-011421451910.3390/polym14214519Impact of Crystallization on the Development of Statistical Self-Bonding Strength at Initially Amorphous Polymer–Polymer InterfacesYuri M. Boiko0Laboratory of Physics of Strength, Ioffe Institute, 26 Politekhnicheskaya Str., 194021 St. Petersburg, RussiaTo investigate the mechanisms of the adhesion (self-bonding) strength (<i>σ</i>) development during the early stages of self-healing of polymer–polymer interfaces and fracture thereof, it is useful to operate not only with the average <i>σ</i> value but with the <i>σ</i> distribution as well. The latter has been shown to obey Weibull’s statistics for such interfaces. However, whether it can also follow the most widely used normal (Gaussian) distribution is currently unclear. Moreover, a more complicated self-healing case, when the <i>σ</i> development at an initially amorphous interface is accompanied by its crystallization, has not been investigated yet in this respect. In order to address these two important issues, 10 pairs of amorphous poly(ethylene terephthalate) (PET) samples were kept in contact for various periods of time from 5 min to 15 h at a temperature (<i>T</i>) of 94 °C (preserving the amorphous state) or <i>T</i> = 150 °C (giving rise to cold crystallization), or both <i>T</i>s. Thereafter, the as-formed amorphous and semi-crystalline PET–PET auto-adhesive joints were shear fractured in tension at ambient temperature. For the first time, the statistical distributions of a number of the measured <i>σ</i> data sets were analyzed and discussed using both Weibull’s and the Gaussian model, including several normality tests.https://www.mdpi.com/2073-4360/14/21/4519poly(ethylene terephthalate)polymer–polymer interfacesself-bondingadhesionlap shear strengthWeibull’s distribution |
| spellingShingle | Yuri M. Boiko Impact of Crystallization on the Development of Statistical Self-Bonding Strength at Initially Amorphous Polymer–Polymer Interfaces Polymers poly(ethylene terephthalate) polymer–polymer interfaces self-bonding adhesion lap shear strength Weibull’s distribution |
| title | Impact of Crystallization on the Development of Statistical Self-Bonding Strength at Initially Amorphous Polymer–Polymer Interfaces |
| title_full | Impact of Crystallization on the Development of Statistical Self-Bonding Strength at Initially Amorphous Polymer–Polymer Interfaces |
| title_fullStr | Impact of Crystallization on the Development of Statistical Self-Bonding Strength at Initially Amorphous Polymer–Polymer Interfaces |
| title_full_unstemmed | Impact of Crystallization on the Development of Statistical Self-Bonding Strength at Initially Amorphous Polymer–Polymer Interfaces |
| title_short | Impact of Crystallization on the Development of Statistical Self-Bonding Strength at Initially Amorphous Polymer–Polymer Interfaces |
| title_sort | impact of crystallization on the development of statistical self bonding strength at initially amorphous polymer polymer interfaces |
| topic | poly(ethylene terephthalate) polymer–polymer interfaces self-bonding adhesion lap shear strength Weibull’s distribution |
| url | https://www.mdpi.com/2073-4360/14/21/4519 |
| work_keys_str_mv | AT yurimboiko impactofcrystallizationonthedevelopmentofstatisticalselfbondingstrengthatinitiallyamorphouspolymerpolymerinterfaces |