Melt or solution processable highly conducting polyaniline and process for preparation thereof, and blends thereof with PVC and EVA
AssigneeCouncil of Scientific and Industrial Research
InventorsRaji Kannaparampil Paul, Chennakkattu Krishna Sadasivan Pillai
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Abstract
The invention relates to a melt or solution processable polyaniline comprising of polyaniline doped or protonated with a dopant of the formula (1), (2) or (3) shown below. The invention also relates to a process for the preparation of said melt or solution processable polyaniline.
Claims22
A melt or solution processable polyaniline which comprises polyaniline doped or protonated with a dopant of the formula (1), (2) or (3) shown below
- said melt or solution processable polyaniline having:
- (a) a conductivity ranging between 3 to 60 S/cm,
- (b) high solubility in weak polar or non polar solvents selected from chloroform, tetrahydrofuran, xylene, and m-cresol,
- (c) thermal stability up to 200° C.,
- (d) three dimensional variable range doping condition in the range of 150 to 50 K (−123° C. to 223° C.), and
- (e) a high degree of crystalline order.
A process for the preparation of melt/solution processable polyaniline by protonating with one or more dopants selected from the compounds of formula (1), formula (2) and formula (3)
- which comprises synthesising said dopants by sulphonation of 3-pentadecyl phenol, methyl ether of 3-pentadecyl phenol and phenoxy acetic acid of 3-pentadecyl phenol, protonating aniline by mechanical mixing or by in situ doping emulsion polymerisation of aniline with said dopants to obtain protonated polyaniline, subjecting the product so obtained to conventional solution and/or melt processing methods to obtain said melt/solution processable polyaniline.
A process for the preparation of conductive blends of protonated polyaniline which comprises synthesising dopants of the formula (1), (2) and (3)
- by sulphonation of 3-pentadecyl phenol, methyl ether of 3-pentadecyl phenol and phenoxy acetic acid of 3-pentadecyl phenol, protonating aniline by mechanical mixing or by in situ doping emulsion polymerisation of aniline with said dopants to obtain protonated polyaniline, subjecting the product so obtained to conventional solution and/or melt processing methods to obtain said melt/solution processable polyaniline and blending said melt/solution processable polyaniline with thermoplastics or elastomer to obtain the conductive blends of protonated polyaniline.
Dependencies are inferred from the claim text.