Influence of shelf-life duration on mechanical, thermal and shape recovery motion derivatives of shape memory polyurethane
Shape memory polymer is widely used in bio-medical applications such as stents, sutures, drug delivery etc., However, the shape recovery behavior and mechanical properties in these applications are crucial and may be affected during shelf storage. The present research, therefore explores the effect...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123024000720 |
| _version_ | 1797247744872546304 |
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| author | Vasavi Boggarapu Sivanagaraju Namathoti Venkata Dinesh Avvari Venkateswara Babu Peddakondigalla Ragavanantham Shanmugam Deepalekshmi Ponnamma P.S. Rama Sreekanth |
| author_facet | Vasavi Boggarapu Sivanagaraju Namathoti Venkata Dinesh Avvari Venkateswara Babu Peddakondigalla Ragavanantham Shanmugam Deepalekshmi Ponnamma P.S. Rama Sreekanth |
| author_sort | Vasavi Boggarapu |
| collection | DOAJ |
| description | Shape memory polymer is widely used in bio-medical applications such as stents, sutures, drug delivery etc., However, the shape recovery behavior and mechanical properties in these applications are crucial and may be affected during shelf storage. The present research, therefore explores the effect of shelf life on mechanical, thermal and shape recovery performance of polyurethane (PU) based shape memory polymer (SMP). Experimental samples S1, S3, S5 and S10 were prepared from polymer pellets that were stored for 1,3,5 and 10-year time duration respectively. FTIR analysis revealed that samples underwent degradation due to chain scissions influencing their performance. The results indicated that tensile and flexural strength decreased by 35.16 % and 29.3 % respectively, from S1 to S10. Fracture surfaces were examined under Scanning Electron Microscopy to identify the failure features. In addition, Differential scanning calorimetry (DSC)exhibited a decrease in glass transition temperature (Tg) from S1 to S10, resulting in a corresponding reduction in the rate of shape restoration. An in-depth analysis is conducted to investigate the relationship between polymer aging and the shape recovery behavior. Finally, the shape recovery motion curves in terms of displacement, velocity and acceleration concerning the time for all the specimens were also discussed in this study. |
| first_indexed | 2024-03-08T09:01:34Z |
| format | Article |
| id | doaj.art-7519e08e050d4d2387cdae64ada5960d |
| institution | Directory Open Access Journal |
| issn | 2590-1230 |
| language | English |
| last_indexed | 2024-04-24T20:03:34Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj.art-7519e08e050d4d2387cdae64ada5960d2024-03-24T07:00:47ZengElsevierResults in Engineering2590-12302024-03-0121101819Influence of shelf-life duration on mechanical, thermal and shape recovery motion derivatives of shape memory polyurethaneVasavi Boggarapu0Sivanagaraju Namathoti1Venkata Dinesh Avvari2Venkateswara Babu Peddakondigalla3Ragavanantham Shanmugam4Deepalekshmi Ponnamma5P.S. Rama Sreekanth6School of Mechanical Engineering, VIT-AP University, Amaravati, Andhra Pradesh, IndiaSchool of Mechanical Engineering, VIT-AP University, Amaravati, Andhra Pradesh, IndiaSchool of Mechanical Engineering, VIT-AP University, Amaravati, Andhra Pradesh, IndiaDepartment of Mechanical Engineering, Vasireddy Venkatadri Institute of Technology, Guntur, IndiaDepartment of Engineering Technology, Fairmont State University, Fairmont, WV -26554, USADept. of Materials Science and Technology, College of Arts and Science, Qatar University, QatarSchool of Mechanical Engineering, VIT-AP University, Amaravati, Andhra Pradesh, India; Corresponding author.Shape memory polymer is widely used in bio-medical applications such as stents, sutures, drug delivery etc., However, the shape recovery behavior and mechanical properties in these applications are crucial and may be affected during shelf storage. The present research, therefore explores the effect of shelf life on mechanical, thermal and shape recovery performance of polyurethane (PU) based shape memory polymer (SMP). Experimental samples S1, S3, S5 and S10 were prepared from polymer pellets that were stored for 1,3,5 and 10-year time duration respectively. FTIR analysis revealed that samples underwent degradation due to chain scissions influencing their performance. The results indicated that tensile and flexural strength decreased by 35.16 % and 29.3 % respectively, from S1 to S10. Fracture surfaces were examined under Scanning Electron Microscopy to identify the failure features. In addition, Differential scanning calorimetry (DSC)exhibited a decrease in glass transition temperature (Tg) from S1 to S10, resulting in a corresponding reduction in the rate of shape restoration. An in-depth analysis is conducted to investigate the relationship between polymer aging and the shape recovery behavior. Finally, the shape recovery motion curves in terms of displacement, velocity and acceleration concerning the time for all the specimens were also discussed in this study.http://www.sciencedirect.com/science/article/pii/S2590123024000720Shape memory polymerDegradationChain scissionShape recoveryMotion curves |
| spellingShingle | Vasavi Boggarapu Sivanagaraju Namathoti Venkata Dinesh Avvari Venkateswara Babu Peddakondigalla Ragavanantham Shanmugam Deepalekshmi Ponnamma P.S. Rama Sreekanth Influence of shelf-life duration on mechanical, thermal and shape recovery motion derivatives of shape memory polyurethane Results in Engineering Shape memory polymer Degradation Chain scission Shape recovery Motion curves |
| title | Influence of shelf-life duration on mechanical, thermal and shape recovery motion derivatives of shape memory polyurethane |
| title_full | Influence of shelf-life duration on mechanical, thermal and shape recovery motion derivatives of shape memory polyurethane |
| title_fullStr | Influence of shelf-life duration on mechanical, thermal and shape recovery motion derivatives of shape memory polyurethane |
| title_full_unstemmed | Influence of shelf-life duration on mechanical, thermal and shape recovery motion derivatives of shape memory polyurethane |
| title_short | Influence of shelf-life duration on mechanical, thermal and shape recovery motion derivatives of shape memory polyurethane |
| title_sort | influence of shelf life duration on mechanical thermal and shape recovery motion derivatives of shape memory polyurethane |
| topic | Shape memory polymer Degradation Chain scission Shape recovery Motion curves |
| url | http://www.sciencedirect.com/science/article/pii/S2590123024000720 |
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