The effect of dynamic vulcanization systems on the mechanical properties and phase morphology of PLA/NR reactive blends
| Autor: | Nittaya Kaeophimmueang, Cattaleeya Pattamaprom, Peerapong Chanthot, Patcharee Larpsuriyakul |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Peroxide law.invention chemistry.chemical_compound Crystallinity Natural rubber Polylactic acid law Materials Chemistry Phase morphology Organic Chemistry Vulcanization Izod impact strength test 021001 nanoscience & nanotechnology Sulfur 0104 chemical sciences chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Journal of Polymer Research. 28 |
| ISSN: | 1572-8935 1022-9760 |
| DOI: | 10.1007/s10965-020-02364-2 |
| Popis: | The effects of dynamic vulcanization systems including sulfur, peroxide, and sulfur/peroxide mixed vulcanization were investigated for dynamically-vulcanized blends of polylactic acid (PLA) and natural rubber (NR) at the PLA/NR ratio of 85/15. For the sulfur system, the CV sub-system (CV1), which used much lower accelerator (TBBS) content than the EV sub-system, rendered higher impact strength and higher %crystallinity. When compared to the peroxide system using DCP as a curative, the impact strength of CV1 sample was almost 4 times lower than the peroxide-cured sample even though their rubber domain sizes and size distributions were comparable. Interestingly, the highest impact strength which was almost 6 times that of the unmodified PLA/NR was achieved when using the mixed sulfur/peroxide system at the CV1/peroxide ratio of 30:70 (S30/DCP70). The lower impact strength of the sulfur-cured system (CV1) compared to those of the peroxide and the mixed-vulcanization systems was potentially due to its significantly higher % crystallinity. |
| Databáze: | OpenAIRE |
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