| 摘要 |
The present invention relates to thermoplastic polyamides and to thermoplastic elastomers based on polyamide with improved thermomechanical performance. They are obtained by grafting along the polymer chain with alkoxysilanes having at least one unsaturation, and especially vinyltrialkoxysilanes of formula CH2=CH-Si-(OR)3 where R represents an alkyl or an alkoxy-substituted alkyl group. The weight ratio of the silane to polyamide in the grafted polymer is generally between 0.1 and 5%. These grafted polyamides may be crosslinked by hydrolysis in steam at 100 DEG C. or by contact with water. The grafted and optionally crosslinked polyamides may be used for producing molded or extruded articles, such as tubes, jackets, single-layer and multilayer films and complex parts, and powder for coating substrates.
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