ISSN:
1436-2449
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
Abstract The present investigation concerns the synthesis of statistical networks similar to vulcanized rubber. We have used liquid precursor polymers: polybutadiene (PB) and polyisoprene (PI) with telechelic siloxanes. The reactivity of the polydienes can be classified as follows: PB units 1,2 ⋙ PI units 3,4 ⋙ PI units 1,4 ≃ 0. The network formation is a function of the ratio R = nb, of pendent double bonds/nb. of ≃ SiH. For R ≃ 1 the networks are rather hard and brittle, for 8 ⩽ R ⩽ 10 they are soft and elastic, whereas for R ≃ 16 the gels obtained are very soft and sticky.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00255394
Permalink