Telechelic poly(thio‐1,4‐phenylene)s and poly(thio‐1,4‐phenylene)‐block‐polyamides

Abstract

Poly(thio-l,4-phenylene)~ (PPS) 5ad with reactive end groups like carboxyl, nitro, cyan0 and aldehyde groups were synthesized under high as well as atmospheric pressure. Carboxyl terminated telechelics 5a were used as starting materials for the synthesis of poly(thio-l&phenylene)block-polyamides. Semicrystalline and amorphous polyamides like Nylon 6 and Tkogamide@ served as coblocks. The formation of block copolymers was approved by the solubility behavior, the NMR and IR spectra as well as high temperature GPC. The thermal stability increases with the fraction of PPS. By DSC, phase separation of the block copolymers was observed at certain compositions and molecular weights. Experimental partReagents and solvents. N-Methyl-e-caprolactam (NMC) and 1 -methyl-2-pyrrolidone (NMP) were distilled over 1,hapthylene diisocyanate and dibutyltin dilaurate as catalyst and than distilled over CaH2. 1,4Dichlorobenzene was distilled and recrystallized from methanol (m.p.

Poly(phenylene sulfide−phenyleneamine) (PPSA): The First Hybrid Structure of Poly(phenylene sulfide) and Polyaniline

“…Poly(phenylene sulfide) (PPS) ( 2 ) and polyaniline (PAni) ( 3 ) are heteroatom-containing polymers with unique properties. While PPS provides a good level of chemical and thermal stability, PAni is important due to its ability to form electrically conducting films …”

Block copolymers of telechelic poly(phenylene sulfide) and semiaromatic thermotropic liquid crystalline polyester segments

“…13,14 The mole ratio of 4-chlorobenzoic acid : 1,4-dichlorobenzene was varied to prepare dicarboxyl terminated PPS (DCTPPS) telechelics of varied chain lengths (n ϭ 6, 9, 12) (Scheme 1). While the empirical formulas of the telechelics are supported by the elemental analyses, the actual block length within the given system would indeed be a varied one, with an average corresponding to that dictated by the 4-chlorobenzoic acid : 1,4-dichloro benzene mole ratio.…”

“…3 Daccord and Sillion 12 reported the preparation of block copolymers of PPS telechelics with other polymers. Heitz et al 13,14 have reported block copolymers of carboxyl-terminated telechelic PPS with polyamides and polyesters.…”

Semiempirical studies of the electronic structure of polyphenylene sulfide phenyleneamine

“…PPS is a polymer where sulfur atoms connect benzenoid rings. PPS presents a good level of chemical and thermal stability, good mechanical properties, easy processability, precise moldability, and dimensional stability 9. PPS has been widely employed in areas such as electrical/electronics, mechanical, automotive, appliance, and coatings applications 10.…”