𝔖 Bobbio Scriptorium
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Synthèse et propriétés d'oligomères dièniques partiellement et totalement hydrogénés

✍ Scribed by Camberlin, Yves ;Golé, Jean ;Pascault, Jean Pierre ;Durand, Jean Pierre ;Dawans, François


Publisher
Wiley (John Wiley & Sons)
Year
1979
Weight
554 KB
Volume
180
Category
Article
ISSN
0025-116X

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✦ Synopsis


Abstract

Hydrogenations of several hydroxy‐terminated low molecular weight polybutadienes (PB) or non functional PB and one polyisoprene by homogeneous catalysis were studied. Hydrogenation of 1,4‐polybutadienes gave solid crystalline polymers. In the case of hydrogenated 1,2‐polymers a decrease of the glass transition temperature was noted, the hydrogenation leading to amorphous polymers. The rheological behaviour of oligomers was found to be Newtonian at low shear rates (≤ 100 s^−1^). The viscosity at T~g~+100°C increased in every case with the hydrogenation rate. It was found that hydrogen bonding induced by hydroxyl groups has a great effect on the glass transition temperature but does not change the viscosity at T~g~ + 100°C.


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