Polyamide, preparation process therefor and uses thereof
The present disclosure relates to a novel polyamide synthesized from biobased monomers. The novel polyamide comprises the repeating unit of formula I, described herein, in which R represents a covalent bond or a divalent hydrocarbon-based group chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics and alkylaromatics. The present disclosure also relates to a process for preparing the said polyamide, to its uses, and to articles and compositions comprising the said polyamide.
1. A polyamide comprising the repeating unit of formula I below:
in which
R represents a covalent bond or a divalent hydrocarbon-based group chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics and alkylaromatics.
2. The polyamide according to claim 1 , in which R is chosen from linear or branched alkyl groups having from 1 to 36 carbon atoms.
3. The polyamide according to claim 2 , in which R is a linear alkyl group having from 4 to 14 carbon atoms.
4. The polyamide according to claim 1 , in which R is chosen from: —(CH 2 ) 4 —, —(CH 2 ) 5 —, —(CH 2 ) 6 —, —(CH 2 )—CH(CH 3 )—(CH 2 ) 3 —, —(CH 2 ) 10 — and —(CH 2 ) 12 —.
5. The polyamide according to claim 1 , in which R is a divalent aromatic hydrocarbon-based group comprising from 6 to 18 carbon atoms.
6. The polyamide according to claim 5 , in which R is 1,4-benzene, 1,3-benzene or —(CH 2 )-Ph-(CH 2 )— in positions 1,3 and 1,4.
7. The polyamide according to claim 1 , wherein said polyamide is a homopolyamide consisting entirely of the repeating unit of formula I.
8. The polyamide according to claim 1 , wherein said polyamide is a copolymer comprising other repeating units different from the unit of formula I.
9. The polyamide according to claim 8 , wherein the repeating units different from the unit of formula I comprise comonomers selected from dicarboxylic acids, diamines, amino acids and/or lactams.
10. The polyamide according to claim 8 , wherein said polyamide is a copolymer chosen from the group consisting of: PA 6T/6TF, PA10T/10TF, PA6T/6TF/66, PA66/6TF, PA12T/12TF and PA610/6TF.
11. An article obtained from the polyamide according to claim 1 , the said article being a molding or extrudate, yarn, fiber, filament, or film.
12. A composition comprising at least the polyamide according to claim 1 , and optionally reinforcing fillers and/or various additives.