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Larrañaga X, Sarasua JR, Zuza E. Role of Inorganic Fillers on the Physical Aging and Toughness Loss of PLLA/BaSO 4 Composites. ACS APPLIED POLYMER MATERIALS 2023; 5:9620-9631. [PMID: 38021210 PMCID: PMC10653123 DOI: 10.1021/acsapm.3c02112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/18/2023] [Accepted: 10/19/2023] [Indexed: 12/01/2023]
Abstract
The addition of inorganic fillers has been reported to increase the toughness of poly(l-lactide) (PLLA), but the effect of physical aging in such composites has been neglected. The present work discusses the effect of the still ongoing segmental relaxation in PLLA-based composites filled with BaSO4 inorganic particles in regard of the filler quantity. By means of differential scanning calorimetry, X-ray diffraction, and tensile testing of progressively aged PLLA filled with particles ranging from 0.5-10 wt %, we observed an increase in the mechanical energy required to activate the plastic flow of the primary structure in the PLLA matrix, which resulted in the embrittlement of the majority of composites upon enough aging. Results further clarify the role of debonding in the activation process of PLLA, and the behavior of the composite is described at the segmental level. Only an addition of 10% of particles has effectively preserved a ductile behavior of the samples beyond 150 aging days; therefore, we strongly remark the significance of studying the effect of physical aging in such composites.
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Affiliation(s)
- Xabier Larrañaga
- Department of Mining-Metallurgy
Engineering and Materials Science & POLYMAT, Faculty of Engineering, University
of the Basque Country (UPV/EHU), Alameda de Urquijo s/n, Bilbao 48013, Spain
| | - Jose R. Sarasua
- Department of Mining-Metallurgy
Engineering and Materials Science & POLYMAT, Faculty of Engineering, University
of the Basque Country (UPV/EHU), Alameda de Urquijo s/n, Bilbao 48013, Spain
| | - Ester Zuza
- Department of Mining-Metallurgy
Engineering and Materials Science & POLYMAT, Faculty of Engineering, University
of the Basque Country (UPV/EHU), Alameda de Urquijo s/n, Bilbao 48013, Spain
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Robust Poly(glycolic acid) Films with Crystal Orientation and Reinforcement of Chain Entanglement Network. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-023-2894-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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3
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Injection Molding Simulation of Polyoxymethylene Using Crystallization Kinetics Data and Comparison with the Experimental Process. POLYMER CRYSTALLIZATION 2022. [DOI: 10.1155/2022/2387752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
It is well known that the processing conditions in polymer processing have a high impact on the resulting material morphology and consequently the component’s mechanical behavior. However, especially for semicrystalline polymers, the tools available for predicting the final morphology of injection molding parts still have significant limitations. In order to investigate the potential of injection molding simulation for the prediction of the morphology, POM homopolymer specimens were injection molded. The crystallization kinetics data were measured, and simulations in 3D and 2.5D with and without crystallization analysis were conducted in Autodesk Moldflow. The simulations are found to be good accordance with the experiments. Predicted spherulite size and crystalline orientation factor reveal a good qualitative correlation with optical micrographs. Also, the evolution of these parameters along the flow path is plausible. The simulation is found to be a powerful tool for morphology prediction in polymeric parts. Its applicability, however, is still limited to 2.5D models in Autodesk Moldflow, which, of course, is insufficient for complex, thick-walled 3-dimensional parts.
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Wang J, in ’t Veld PJ, Robbins MO, Ge T. Effects of Coarse-Graining on Molecular Simulation of Craze Formation in Polymer Glass. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c01969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiuling Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | | | - Mark O. Robbins
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Ting Ge
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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Affiliation(s)
- Jiuling Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Ting Ge
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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Tang Z, Fujimoto K, Okazaki S. All-atom molecular dynamics study of impact fracture of glassy polymers. II: Microscopic origins of stresses in elasticity, yielding, and strain hardening. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122908] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Razavi M, Cheng S, Huang D, Zhang S, Wang SQ. Crazing and yielding in glassy polymers of high molecular weight. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122445] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Gao XR, Li Y, Huang HD, Xu JZ, Xu L, Ji X, Zhong GJ, Li ZM. Extensional Stress-Induced Orientation and Crystallization can Regulate the Balance of Toughness and Stiffness of Polylactide Films: Interplay of Oriented Amorphous Chains and Crystallites. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00932] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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9
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Gao Z, Liu W, Li Q, Yue Z. Creep life assessment craze damage evolution of polyethylene methacrylate. ADVANCES IN POLYMER TECHNOLOGY 2018. [DOI: 10.1002/adv.22146] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zongzhan Gao
- School of Mechanics, Civil Engineering and Architecture; Northwestern Polytechnical University; Xian China
| | - Wei Liu
- School of Mechanics, Civil Engineering and Architecture; Northwestern Polytechnical University; Xian China
| | - QingHai Li
- School of Mechanics, Civil Engineering and Architecture; Northwestern Polytechnical University; Xian China
| | - ZhuFeng Yue
- School of Mechanics, Civil Engineering and Architecture; Northwestern Polytechnical University; Xian China
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10
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Zhao Y, Liu J, Li X, Lu Y, Wang SQ. How and Why Polymer Glasses Lose Their Ductility Due to Plasticizers. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02158] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yue Zhao
- Department of Polymer Science
and Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325-3909, United States
| | - Jianning Liu
- Department of Polymer Science
and Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325-3909, United States
| | - Xiaoxiao Li
- Department of Polymer Science
and Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325-3909, United States
| | - Yue Lu
- Department of Polymer Science
and Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325-3909, United States
| | - Shi-Qing Wang
- Department of Polymer Science
and Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325-3909, United States
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11
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Jia C, Zhang Q, Liao X, Zhu J, Wu L, Ni K, Yang Q, An Z, Li G. Hierarchical microstructure changes and the molecular mechanism of polypropylene under a critical failure strain during creep. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.04.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Shavit A, Riggleman RA. Strain localization in glassy polymers under cylindrical confinement. Phys Chem Chem Phys 2015; 16:10301-9. [PMID: 24676009 DOI: 10.1039/c3cp55330b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although the origin of ductility in crystalline materials is well understood through the motion of dislocations and defects, a similar framework for understanding deformation in amorphous materials remains elusive. In particular, the difference in the mechanical response for small-molecule amorphous solids, such as organic glasses that are typically brittle, and polymer glasses, which are frequently very tough, has not been systematically explored. Here, we employ molecular dynamics simulations to investigate the mechanical response of model glassy polymers confined to a nanoscopic pillar under tensile deformation. We vary the chain length, cooling rate for forming the glass, and the deformation rate and investigate the changes in the mechanical response. We find that samples that are cooled at a slower rate and deformed at a slower rate are more prone to localization of the strain response, or shear banding. Interestingly, this effect is independent of chain length over the range of parameters we have investigated so far, and we believe this is the first direct observation of shear banding in deformed polymer glasses under cylindrical confinement. Finally, by using the isoconfigurational ensemble approach, we provide evidence that the location where the shear band forms is due to structural features that are frozen in place during sample preparation.
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Affiliation(s)
- Amit Shavit
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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13
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Huang T, Miura M, Nobukawa S, Yamaguchi M. Chain Packing and Its Anomalous Effect on Mechanical Toughness for Poly(lactic acid). Biomacromolecules 2015; 16:1660-6. [DOI: 10.1021/acs.biomac.5b00293] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tong Huang
- School of Materials Science, Japan Advanced Institute of Science and Technology 1-1 Asahidai, Nomi, Ishikawa 923-1292 Japan
| | - Motohiro Miura
- School of Materials Science, Japan Advanced Institute of Science and Technology 1-1 Asahidai, Nomi, Ishikawa 923-1292 Japan
| | - Shogo Nobukawa
- School of Materials Science, Japan Advanced Institute of Science and Technology 1-1 Asahidai, Nomi, Ishikawa 923-1292 Japan
| | - Masayuki Yamaguchi
- School of Materials Science, Japan Advanced Institute of Science and Technology 1-1 Asahidai, Nomi, Ishikawa 923-1292 Japan
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14
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Zhou C, Li H, Zhang Y, Xue F, Huang S, Wen H, Li J, de Claville Christiansen J, Yu D, Wu Z, Jiang S. Deformation and structure evolution of glassy poly(lactic acid) below the glass transition temperature. CrystEngComm 2015. [DOI: 10.1039/c5ce00669d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mesocrystal was found to form from the mesophase of glassy PLA stretched below the glass transition temperature.
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Affiliation(s)
- Chengbo Zhou
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072, PR China
| | - Hongfei Li
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, PR China
| | - Yao Zhang
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072, PR China
| | - Feifei Xue
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072, PR China
| | - Shaoyong Huang
- Key Laboratory of Polymer Eco-materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, PR China
| | - Huiying Wen
- College of Engineering and Technology
- Northeast Forestry University
- Harbin 150040, PR China
| | - Jingqing Li
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072, PR China
| | | | - Donghong Yu
- Department of Chemistry and Biosciences
- Aalborg University
- Aalborg, Denmark
| | - Zhonghua Wu
- Beijing Synchrotron Radiation Laboratory
- Institute of High Energy Physics
- Chinese Academy of Science
- Beijing 100039, PR China
| | - Shichun Jiang
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072, PR China
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15
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Wang SQ, Cheng S, Lin P, Li X. A phenomenological molecular model for yielding and brittle-ductile transition of polymer glasses. J Chem Phys 2014; 141:094905. [DOI: 10.1063/1.4893765] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Shi-Qing Wang
- Morton Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325, USA
| | - Shiwang Cheng
- Morton Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325, USA
| | - Panpan Lin
- Morton Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325, USA
| | - Xiaoxiao Li
- Morton Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325, USA
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16
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Affiliation(s)
- Shiwang Cheng
- Maurice Morton Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325-3909, United States
| | - Shi-Qing Wang
- Maurice Morton Institute of Polymer Science and Engineering, University of Akron, Akron, Ohio 44325-3909, United States
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