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Mechanical behaviou...
Mechanical behaviour of poly(lactic acid)/cellulose nanocrystal nanocomposites : A comparative study between conventional tensile test and small punch test
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- Singh, Shikha (författare)
- Luleå tekniska universitet,Materialvetenskap,Centre Català del Plàstic (CCP)-Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC)-ePLASCOM. Avda. Eduard Maristany, 14. 08019 Barcelona, Spain
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- Santana-Pérez, O. (författare)
- Centre Català del Plàstic (CCP)-Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC)-ePLASCOM. Avda. Eduard Maristany, 14. 08019 Barcelona, Spain
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- Rodriguez, C. (författare)
- IUTA, Universidad de Oviedo, Edificio Departamental Oeste, N-7, 33203 Gijón, Spain
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- Oksman, Kristiina, 1959- (författare)
- Luleå tekniska universitet,Materialvetenskap
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- Maspoch, M. Ll. (författare)
- Centre Català del Plàstic (CCP)-Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC)-ePLASCOM. Avda. Eduard Maristany, 14. 08019 Barcelona, Spain
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(creator_code:org_t)
- Budapest University of Technology and Economics, 2020
- 2020
- Engelska.
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Ingår i: Express Polymer Letters. - : Budapest University of Technology and Economics. - 1788-618X. ; 14:12, s. 1127-1136
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- The use of nanocomposites is increasingly frequent as a way to improve the mechanical behaviour of polymers. In the specific case of poly(lactic acid) (PLA), the use of cellulose nanocrystals (CNC) as a reinforcing material is an interesting option, once the tendency of CNCs to agglomerate has been solved. One of the possible solutions to this problem is a superficial modification of CNC’s nanocrystals through a ring-opening polymerization (ROP) process. This work analyzes the use of CNC nanocrystals modified using ROP (mCNC) as a reinforcement of PLA. The mechanical properties of PLA/CNC nanocomposites are evaluated using tensile tests and small punch tests (SPT) on films prepared by extrusion calendering and post processed by compression molding. The addition of non-modified CNC promotes multiple crazing in PLA, increasing its ductility. mCNC leads to a more dispersed nanocomposite, a slight increase in the elastic modulus and a drastic decrease of crazing in tensile tests. The same tendency has been observed with SPT, and the applicability of this test in the prediction of the tensile modulus (E) of polymeric nanocomposites has been demonstrated. However, more work is needed to find the ideal SPT parameter to estimate the yield point.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Biomaterial (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bio Materials (hsv//eng)
Nyckelord
- biopolymers
- biocomposites
- material testing
- poly(lactic acid) (PLA)
- cellulose nanocrystals (CNC)
- small punch test (SPT)
- Trä och bionanokompositer
- Wood and Bionanocomposites
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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