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Poly(ethylene terephthalate)‐polyethylene block copolymer architecture effects on interfacial adhesion and blend compatibilization.
- Source :
- Journal of Polymer Science; Feb2024, Vol. 62 Issue 4, p753-765, 13p
- Publication Year :
- 2024
-
Abstract
- In this study, poly(ethylene terephthalate)‐block‐polyethylene (PET‐PE) multiblock copolymers (MBCPs) with block molar masses of ~4 or 7 kg mol−1 and either alternating or random block sequencing, and a PE‐PET‐PE triblock copolymer (TBCP) of comparable total molar mass, were synthesized. To explore the effect of molecular architecture on compatibilization, both MBCPs and TBCPs were blended into 80/20 wt/wt mixtures of PET/linear low‐density PE (LLDPE). Compatibilization was remarkably efficient for all MBCP types, with the addition of 0.2 wt% yielding blends nearly as tough as PET homopolymer. Addition of MBCP also significantly decreases LLDPE dispersed phase sizes compared to PET/LLDPE neat blends, as much as 80% in as‐mixed blends and by a factor of 10 in post‐mixing thermally annealed samples. Conversely, the TBCP was less efficient at decreasing domain sizes of the blends and improving the mechanical properties, requiring loadings of 1 wt% to produce comparably tough blends. Peel tests of PET/BCP/LLDPE trilayer films showed that both MBCPs and TBCP all improve interfacial strength over a PET‐PE bilayer film by two orders of magnitude; however, when the BCPs were preloaded into LLDPE, only the MBCP containing films showed strong adhesion highlighting their potential utility as adhesive agents in multilayer films. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 26424150
- Volume :
- 62
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Polymer Science
- Publication Type :
- Academic Journal
- Accession number :
- 175446475
- Full Text :
- https://doi.org/10.1002/pol.20230404