Dynamically vulcanized polylactic acid/natural rubber/waste rubber blends: effect of the rubber content
Source abstract
Abstract
The reduction in the production of conventional polymers based on crude oil by using bio-based plastics and by valorizing rubber wastes is an essential route to reverse the negative impact of the polymer industry on the environment. To contribute to this challenge, we prepared polylactic acid (PLA)/natural rubber (NR)/ground tyre rubber (GTR) blends via dynamic vulcanization. The PLA/NR/GTR blends with a rubber content and above 30 wt% show a continuous rubber phase (NR/GTR) where the GTR particles are encapsulated into the NR matrix as shown by dissolution experiment in dichloromethane and microscopy images on etched samples. PLA/NR/GTR blends with 30 wt% of rubber show a tensile modulus of 1.3 GPa, a tensile toughness of 8.3 MJ m-3 and an impact strength of 260 kJ m-2 higher than 1.1 GPa, 4.2 MJ m-3 and 160 kJ m-2, respectively, for the binary PLA/NR blend. The presence of reinforcing carbon black particles in the GTR as well as their partially vulcanized state of the GTR before dynamic vulcanization may result in a higher cross-linking level of the rubber phase in the ternary blends as compared to binary blends that likely contribute to concomitantly improve tensile modulus, toughness and impact tensile strength.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: biodegradable polymer synthesis and properties · Polymer crystallization and properties · Polymer Nanocomposites and Properties
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References (61)
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