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Sunay MS. Effects of Polystrene (PS) Molecular Weight and Metal Oxide (TiO 2) Content of PS Latex/TiO 2 Nanocomposites on their Film Formation Behavior. J MACROMOL SCI B 2022. [DOI: 10.1080/00222348.2022.2127268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- M. Selin Sunay
- Mimar Sinan Fine Arts University, 34380, İstanbul- TURKEY
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Niinivaara E, Ouzas A, Fraschini C, Berry RM, Dubé MA, Cranston ED. How latex film formation and adhesion at the nanoscale correlate to performance of pressure sensitive adhesives with cellulose nanocrystals. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2021; 379:20200330. [PMID: 34334024 DOI: 10.1098/rsta.2020.0330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/11/2021] [Indexed: 06/13/2023]
Abstract
Emulsion polymerized latex-based pressure-sensitive adhesives (PSAs) are more environmentally benign because they are synthesized in water but often underperform compared to their solution polymerized counterparts. Studies have shown a simultaneous improvement in the tack, and peel and shear strength of various acrylic PSAs upon the addition of cellulose nanocrystals (CNCs). This work uses atomic force microscopy (AFM) to examine the role of CNCs in (i) the coalescence of hydrophobic 2-ethyl hexyl acrylate/n-butyl acrylate/methyl methacrylate (EHA/BA/MMA) latex films and (ii) as adhesion modifiers over multiple length scales. Thin films with varying solids content and CNC loading were prepared by spin coating. AFM revealed that CNCs lowered the solids content threshold for latex particle coalescence during film formation. This improved the cohesive strength of the films, which was directly reflected in the increased shear strength of the EHA/BA/MMA PSAs with increasing CNC loading. Colloidal probe AFM indicated that the nano-adhesion of thicker continuous latex films increased with CNC loading when measured over small contact areas where the effect of surface roughness was negligible. Conversely, the beneficial effects of the CNCs on macroscopic PSA tack and peel strength were outweighed by the effects of increased surface roughness with increasing CNC loading over larger surface areas. This highlights that CNCs can improve both cohesive and adhesive PSA properties; however, the effects are most pronounced when the CNCs interact favourably with the latex polymer and are uniformly dispersed throughout the adhesive film. This article is part of the theme issue 'Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 1)'.
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Affiliation(s)
- Elina Niinivaara
- Chemical Engineering Department, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4L8
- Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, British Columbia, Canada V6T 1Z4
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Vuorimiehentie 1, 0076 Aalto, Espoo, Finland
| | - Alexandra Ouzas
- Department of Chemical and Biological Engineering, Centre for Catalysis Research and Innovation, University of Ottawa, 161 Louis Pasteur, Ottawa, Ontario, Canada K1N 6N5
| | - Carole Fraschini
- FPInnovations, 570 Saint-Jean Boulevard, Pointe Claire, Quebec, Canada H9R 3J9
| | - Richard M Berry
- CelluForce Inc., 570, Boulevard Saint-Jean, Pointe-Claire, Quebec, H9R 3J9
| | - Marc A Dubé
- Department of Chemical and Biological Engineering, Centre for Catalysis Research and Innovation, University of Ottawa, 161 Louis Pasteur, Ottawa, Ontario, Canada K1N 6N5
| | - Emily D Cranston
- Chemical Engineering Department, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4L8
- Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, British Columbia, Canada V6T 1Z4
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia, Canada V6T 1Z3
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Hu L, Zhang C, Hu Y, Chen Y, Chen W. Effect of annealing on self-organized gradient film obtained from poly(3-[tris(trimethylsilyloxy)silyl] propyl methacrylate-co-methyl methacrylate)/poly(methyl methacrylate-co-n-butyl acrylate) blend latexes. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-011-2582-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Zhang Z, Yang X. Effect of molecular weight on the interpenetration of polymer chain-globules. Polym Bull (Berl) 2005. [DOI: 10.1007/s00289-005-0475-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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