Thermoplastic polyurethanes (TPUs) with grafted organosilane moieties: A new way of improving thermomechanical behavior
DUMON, Michel
Ingénierie des Matériaux Polymères [IMP]
Laboratoire de Chimie des Polymères Organiques [LCPO]
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Ingénierie des Matériaux Polymères [IMP]
Laboratoire de Chimie des Polymères Organiques [LCPO]
DUMON, Michel
Ingénierie des Matériaux Polymères [IMP]
Laboratoire de Chimie des Polymères Organiques [LCPO]
< Reduce
Ingénierie des Matériaux Polymères [IMP]
Laboratoire de Chimie des Polymères Organiques [LCPO]
Language
en
Article de revue
This item was published in
Polymer Engineering and Science. 2002, vol. 42, n° 8, p. 1724-1739
Wiley-Blackwell
English Abstract
Organosilanes were grafted on thermoplastic polyurethanes (TPUs) using an internal mixer or reactive extrusion. The reaction described here proceeds in two stages, with the help of a diisocyanate as a coupling agent to ...Read more >
Organosilanes were grafted on thermoplastic polyurethanes (TPUs) using an internal mixer or reactive extrusion. The reaction described here proceeds in two stages, with the help of a diisocyanate as a coupling agent to create allophanate junctions between TPU chains and an aminosilane. Such materials could then be crosslinked by a hydrolytic condensation mechanism, resulting in increased thermomechanicalproperties. The starting TPU was at first carefully characterized. Using the plastograph, the different stages (reactions between TPU and diisocyanate, isocyanate-grafted TPU and aminosilane, but also between TPU and aminosilane alone) were then studied separately, together with the influence of several essential parameters (time, temperature, rotating speed, etc.). Optimal conditions for a well-controlled grafting process were defined, and the different ways of crosslinking the TPU chains were compared.Read less <
English Keywords
thermomechanical properties
hydrolytic condensation
thermoplastic polyurethanes (TPUs)
grafting
alkoxysilanes
Origin
Hal imported