The Effect of Epoxidation on Strain-Induced Crystallization of Epoxidized Natural Rubber.
Macromol Rapid Commun
; 40(14): e1900042, 2019 Jul.
Article
en En
| MEDLINE
| ID: mdl-31021434
ABSTRACT
The effect of epoxidation on strain-induced crystallization (SIC) of epoxidized natural rubber (ENR) and mechanism are studied with synchrotron radiation wide-angle X-ray diffraction (SR-WAXD) and polarized infrared spectroscopy (P-IR). WAXD results reveal that appropriate epoxidation, for example, ENR-25 epoxidized with ≈25% isoprene units, can unexpectedly enhance the SIC of natural rubber (NR), resulting in the improvement of tear resistance. On the other hand, exorbitant epoxidation, for example, ENR-40 epoxidized with ≈40% isoprene units, depresses the SIC and weakens the mechanical properties of NR remarkably. P-IR studies reveal that epoxidation can promote the orientation of chain segments along the stretching direction, which plays a determining role on SIC of NR. Accordingly, hierarchical multiscale schematic models are proposed. This insight into epoxidation on SIC of ENR strongly suggests that ENR with appropriate epoxidation degree is a promising candidate material for the fabrication of high-performance engineering rubber products.
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Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Goma
/
Butadienos
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Hemiterpenos
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Compuestos Epoxi
Idioma:
En
Año:
2019
Tipo del documento:
Article