Presentation on the Patient of
SUBMITTED BY: MUHTASIM FUAD
ID: 202015070 DEPT: TEM
Aromatic polyamides are high performance materials with superior
thermal and mechanical properties which make them extremely useful for
advanced technologies. These polymers can be transformed into high-
tensile strength synthetic fibers and into flame and cut-resistant materials
that have technological applications in the field of coatings and fillers in
the aerospace and armaments industry, in asbestos substitutes, electrical
insulation, bullet-proof body armor, industrial filters, and sports fabrics,
Commercial Polyphthalamides, Poly(Amide Imide)s and
Wholly Aromatic Polyamides
According to the US Federal Trade Commission (FCT), wholly aromatic
polyamides (aramids) are synthetic poly- amides in which at least 85% of
amide groups are bound directly to two aromatic rings. Scheme (1) shows
the first commercialized aramids, which are the most important from an
economic point of view, their constituent monomers, and some of the
tradenames they have used over the last 40 years.
RECENT AROMATIC POLYAMIDE PATENTS
Safety and Resistant Materials :
Zhu et al. have described a yarn for use in arcwelding and flame protection
fabrics with resistance to tears and abrasion that comprises a modacrylic,
p-aramid and maramid fiber. Five years ago, Ghorashi et al. reported on
wicking fabrics comprising aramid crystallized yarns that are particularly
useful in protective garments, i.e. for firefighters, etc. Nowadays, the
aeronautic industry is demanding lightweight, flexibility and flameproof
materials for aircraft construction. Along these lines, Forsten and Khan 
have reported a flame barrier paper, based on PMPI fibrids and mica, which
meet these requirements.
Ekiner and Simmons reported on membranes used to separate fluids for
the production of oxygen-enriched air, nitrogen-enriched air, for the
separation of carbon dioxide from hydrocarbons, and the separation of
hydrogen from various petrochemical and oil refining streams. The
membranes are made with blends of polyamides, polyimides and
polyimide-amide polymers, Scheme (5). They show high strength, chemical
resistance, and are suitable for high pressure and temperature applications.
Biomaterials and Polyamide Systems for Medical Applications:
Polyamides, such as polymers with the amide linkage, can be formulated to
mimic the natural behavior of hair, even in the presence of humidity.
Shirakashi et al. have very recently reported on partially aromatic
polyamides containing hexamethylene diamine and terephthalic acid
monomers used together with an aliphatic polyamide in artificial hair and
wigs. In the treatment of disease, Sugiyama et al.  have developed a
pyrrole-imidazole polyamide with the ability of alkylating and recognizing a
a specific DNA base sequence. This occurs via a vinyl linker at the end of
the pyrroleimidazole polyamide that has a cyclopropylindone, which in turn
allows gene-level anticancer drug development for the inhibition of the
expression of a specific gene.
 Fink JK. High performance polymers. William Andrew Inc., Norwich,
 Rules and Regulations Under the Textile Fiber Products Identification
Act (http://www.ftc.gov/os/statutes/textile/rr-textl. pdf), Part 303.7 (Generic
names and definitions for manufactured fibers), US Federal Trade
Commission (FCT) 2002.
 Vollbracht L. Aromatic polyamides comprehensive polymer science. In:
Eastwoond GC, Ledwith A, Russo S, Sigwalt P, Eds. Allen G, Bevington JC,
Chairmans of the Editorial boards. Pergamon Press: Oxford 1989.