Polyamides and polyesters containing 2,2-di-2`-thienylpropane links were synthesized by the interfacial polycondensation of 2,2-bis-(5-chlorocarbonyl-2- thienyl)propane with various diamines and diols in water-dichloromethane solvents at 25℃ in the presence of sodium hydroxide as an acid acceptor.
The structures of these polymers were identified by IR spectroscopy. Characteristic absorption bands of polyamides appeared at $3380-3240cm^{-1}$ (NH stretching), $1670-1640cm^{-1}$(amide Ⅰ band), and $1560-1540cm^{-1}$ (amide Ⅱ band) and those of polyesters were observed at $1750-1720cm^{-1}$ (carbonyl stretching of ester group). The properties of these polyamides and polyesters were also investigated. The resulting polyamides had inherent viscosities in the range of 0.25-0.69 dl/g and those of polyesters were 0.12-0.33 dl/g. And polyamides were obtained in higher yields than polyesters.
Although most of the polyamides were soluble in polar solvents, polyesters were quite insoluble in common organic solvents. These polymers revealed relatively good thermal stability. The TGA data showed 5% weight losses of polyamides at 257-383℃ and those of polyesters at 244-308℃.
2,2-비스-( 5-클로로 카르보닐-2-티엔닐 )프로판을 여러가지 디아민이나 디올화합물과 계면축중합 반응을 행하여 2,2-디-2'-티엔닐프로판 결합을 가지는 폴리아미드와 폴리에스테르를 합성하였으며 이들중합체의 구조는 적외선 스펙트럼으로 확인하였다. 폴리아미드의 적외선 스펙트라에서는 $3380-3240^{-1}$ (NH신축), $1670-1640cm^{-1}$ (아미드Ⅰ 흡수띠) 및 $1560- 1540cm^{-1}$ (아미드Ⅱ 흡수띠)에서 특성적인 흡수띠가 나타났으며 폴리에스테르의 적외선스펙트라에서는 $1750-1720cm^{-1}$에서 에스테르결합의 카르보닐 신축운동의 특성적인 흡수띠가 강하게 나타났다.
얻어진 폴리아미드와 폴리에스테르의 대수점도는 각각 0.25-0.69dl/g와 0.12-0.33dl/g의 값을 가졌으며 폴리아미드의 중합수율이 폴리에스테르의 경우보다 더 높았다.
대부분의 폴리아미드중합체는 극성용매에 녹았으나 폴리에스테르는 일반적인 유기용매에 거의 녹지 않았다. 이들 중합체의 열중량 분석결과에 의하면 폴리아미드와 폴리에스테르의 5% 중량감소가 일어나는 온도범위는 각각 257-383℃와 244-308℃로서 비교적 우수한 열안정성을 나타내었다.