The monomer containing carbonyl group, bis(4-bromoacetyl phenyl)methane was synthesized by the Friedel-Crafts reaction of biphenylmethane with acetyl chloride followed by bromination. The other monomers containing carbonyl group, such as bis(4-bromoacetyl phenyl) and bis(4-bromoacetyl phenyl)ether were synthesized by the Friedel-Crafts reaction of biphenyl and biphenyl ether with bromoacetyl chloride.
These monomers were polycondensed with several dibasic acids such as malonic, succinic, glutaric, adipic and terephthalic acid to obtain polymers containing ketone and ester group. The monomers were polycondensed in N,N'-dimethylformamide in the presence of potassium fluoride as catalyst at 40℃ for an hour. Polymerization yields were 90-99%.
The structures of the several monomers and resulting polymers were characterized by IR and $H^1$-NMR spectroscopy.
IR spectrum of monomers showed characteristic absorption band at $3050-3100 cm^{-1}$ (aromatic C-H stretching) and $1700-1720 cm^{-1}$ (C=O stretching), those of resulting polymers were observed at $3100 cm^{-1}$ (aromatic C-H stretching) and $1680-1750 cm^{-1}$ (C=O stretching of ketone and ester group) region.
The physical properties of such as DSC, TGA and inherent viscosity were also investigated.
페닐기를 포함하고 있는 단량체인 디브로모아세릴 화합물은 방향족 화합물과 브로모아세틸 클로라이드의 Friedel-Crafts반응에 의해 얻어진다.
캐론기와 에스테르기를 동시에 포함하고 있는 고분자는, 포타시움풀루오라이드 존재하에서, 디브로모아세릴 화합물과 여러가지 이중산을 40℃ 에서 2시간동안 축중합함으로 만들어진다.
생성된 고분자의 구조는 IR 과 $H^1$-NMR분광학에 의해 확인되었으며, 물리적인 성질도 조사되어졌다.
고분자의 고유점도는 0.16-0.81 dl/g 의 범위에 있었다. 바이페닐렌기를 가지고 있는 고분자는 상대적으로 좋은 열적안정성을 나타내었다. 열중량분석자료는 고분자의 5% 무게감소가 234-355℃에서 일어남을 보였다.
또한 이들 고분자의 녹는점은 167-204℃ 의 범위에 있었다.
