Nonuniformity in Cross-Linked Natural Rubber as Revealed by Contrast-Variation Small-Angle Neutron Scattering
| Autor: | Yota Kokubo, Shinzo Kohjiya, Noboru Osaka, Hanako Asai, Takuya Suzuki, Yuko Ikeda, Mitsuhiro Shibayama, Norihito Higashitani, Hitoshi Endo |
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| Rok vydání: | 2010 |
| Předmět: |
Organic peroxide
Polymers and Plastics Chemistry Scattering Organic Chemistry Mineralogy Neutron scattering Small-angle neutron scattering Inorganic Chemistry chemistry.chemical_compound Natural rubber Deuterium Chemical physics visual_art Materials Chemistry medicine visual_art.visual_art_medium Swelling medicine.symptom Nanoscopic scale |
| Zdroj: | Macromolecules. 43:1556-1563 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma9019416 |
| Popis: | The microscopic structures of cross-linked natural rubber (NR) were investigated by means of contrast-variation small-angle neutron scattering (CV-SANS) coupled with “visualization-by-swelling method” as a function of dicumyl peroxide (DCP; cross-linker) content, where the various types of inhomogeneities in the rubber were visualized by swelling with deuterated solvent. Detailed analyses of the partial scattering functions of each component confirm the existence of network inhomogeneities due to cluster-like structures of polyisoprene chains as well as larger inhomogeneities of protein aggregates. The observed partial scattering functions of polyisoprene with different DCP contents clearly exhibited that (1) the network inhomogeneities were strongly suppressed by DCP addition and (2) the structure of protein aggregates was not significantly influenced by the introduction of the peroxide cross-linking. These nanoscopic structural aspects with respect to the content of cross-linker provide better understan... |
| Databáze: | OpenAIRE |
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