Hot-melt adhesives based on co-polyamide and multiwalled carbon nanotubes
Paulina Latko-Durałek , Jan Macutkevic , Christopher Kay , Anna Boczkowska , T Mcnally
AbstractComposites 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.
|Journal series||Journal of Applied Polymer Science, ISSN 0021-8995|
|Publication size in sheets||2299.95|
|Keywords in Polish||kopolimery; właściwości dielektryczne, wytłaczanie, grafen i fulereny; nanorurki; zależności struktura-właściwości|
|Keywords in English||copolymers; dielectric properties; extrusion; graphene and fullerenes; nanotubes; structure-property relationships|
|Score|| = 25.0, 09-01-2018, ArticleFromJournal|
= 25.0, 09-01-2018, ArticleFromJournal
|Publication indicators||: 2016 = 1.86 (2) - 2016=1.727 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.