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Reinforced chloroprene rubber by in situ generated silica particles: Evidence of bound rubber on the silica surface

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Original languageEnglish
Article number43717
JournalJournal of Applied Polymer Science
Issue number30
Publication statusPublished - 10 Aug 2016
Publication typeA1 Journal article-refereed


Nano silica is generated in situ inside the uncrosslinked chloroprene rubber (CR) by the sol-gel reaction of tetraethoxysilane (TEOS). This results in appreciable improvement in mechanical properties of the CR composites at relatively low filler content. Furthermore, exploitation of reactive organosilanes, γ-aminopropyltrimethoxysilane (γ-APS) in particular, in the silica synthesis process facilitates growing of spherical silica particles with a size distribution in the range of 20-50 nm. The silica particles are found to be uniformly dispersed and they do not suffer from filler-filler interaction. Additionally, it is observed that the silica particles are coated by silane and rubber chains together which are popularly known as bound rubber. The existence of the bound rubber on silica surface has been supported by the detailed investigations with transmission electron microscopy (TEM), energy filtered transmission electron microscopy (EFTEM) and energy dispersive X-ray spectroscopy (EDAX). The interaction between rubber and silica, via bi-functionality of the γ-APS, has been explored by detailed FTIR studies.


  • bound rubber, in situ silica and silane treatment, transmission electron microscopy

Publication forum classification

Field of science, Statistics Finland