Hot-melt adhesives based on co-polyamide and multiwalled carbon nanotubes

Paulina Latko-Durałek , Jan Macutkevic , Christopher Kay , Anna Boczkowska , T Mcnally

Abstract

Composites of two hot melt adhesives based on co-polyamides, one high viscosity (coPA_A), the other low viscosity (coPA_B), and multiwalled carbon nanotubes (MWCNTs) were prepared using twin-screw extrusion via dilution of masterbatches. Examination of these composites across the length scales confirmed that the MWCNTs were uniformly dispersed and distributed in the polymer matrices, although some micron size agglomerations were also observed. A rheological percolation was determined from oscillatory rheology measurements at a mass fraction of MWCNTs below 0.01 for coPA_B and, between 0.01 and 0.02 for coPA_A. Significant increases in complex viscosity and storage modulus confirmed the “pseudo-solid” like behavior of the composite materials. Electrical percolation, determined from dielectric spectroscopy was, found to be at 0.03 and 0.01 MWCNT mass fraction for coPA_A and coPA_B based composites, respectively. Addition of MWCNTs resulted in heterogeneous nucleation and altered the crystallization kinetics of both copolymers. Indirect evidence from contact angle measurements and surface energy calculations confirmed that MWCNT addition enhanced the adhesive properties of coPA_B to a level similar to coPA_A.
Author Paulina Latko-Durałek
Paulina Latko-Durałek,,
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, Jan Macutkevic
Jan Macutkevic,,
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, Christopher Kay
Christopher Kay,,
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, Anna Boczkowska ZMCP
Anna Boczkowska,,
- Division of Ceramic Materials and Polymers
, T Mcnally
T Mcnally,,
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Journal seriesJournal of Applied Polymer Science, ISSN 0021-8995
Issue year2018
Vol135
No11
Pages45999-46014
Publication size in sheets2299.95
Keywords in Polishkopolimery; właściwości dielektryczne, wytłaczanie, grafen i fulereny; nanorurki; zależności struktura-właściwości
Keywords in Englishcopolymers; dielectric properties; extrusion; graphene and fullerenes; nanotubes; structure-property relationships
DOIDOI:10.1002/app.45999
Languageen angielski
Additional file
J.Appl. Polym. Sci 2018 - Hot-meltadhesives.pdf (file archived - login or check accessibility on faculty) J.Appl. Polym. Sci 2018 - Hot-meltadhesives.pdf 1.83 MB
Score (nominal)25
ScoreMinisterial score = 25.0, 09-01-2018, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 09-01-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.86 (2) - 2016=1.727 (5)
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