Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
권호 표지

Studies on the Styrenic Polymers(1), Imidization of Poly(styrene-co-maleic anhydrides) and Their Thermal Properties

Styrenic Polymers연구(1), Poly(styrene-co-maleic anhydride)의 이미드화와 열적 성질

  • Ahn, Tae-Oan (Department of Chemical Technology Seoul National University) ;
  • Park, Lee-Soon (Department of Polymer Science Kyungpook National University) ;
  • Lee, Sang-Soo (Department of Chemical Technology Seoul National University) ;
  • Kim, Gi-Heon (Department of Polymer Science Kyungpook National University)
  • Received : 1992.02.11
  • Accepted : 1992.02.29
  • Published : 1992.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

Poly(styrene-co-maliec anhydride) was reacted with aromatic amines such as aniline, p-toluidine, and p-chloroaniline in 10% (w/w) DMF solution to convert maleic anhydride units into maleimides. Optimum reaction conditions for cyclodehydration step of imide ring formation were : (a) reaction temp. of $80^{\circ}C$ (b) mole ratios of cyclodehydration agents : anhydride units in SMA/acetic anhydride/sodium acetate/triethyl amine= 1.0/2.0/0.2/1.1. $T_g$of SMI(imide modified SMA) was increased with increasing degree of imidization, but $T_g$leveled off in the early stage of imide content. And $T_g$of SMI was increased with the following order of amines used for imidization reagents : aniline < p-toluidine < p-chloroaniline.

Poly(styrene-co-maleic anhydride), SMA를 DMF 용매에 약 10%(w/w) 용액으로 한 다음 aniline, p-toluidine 및 p-chloroaniline 등으로 maleic anhydride 반복 단위를 imide화 하였다. 이미드화에 있어서 환화 탈수제(cyclodehydration agents)를 사용하였으며 최적 반응조건은 다음과 같았다. (a) 반응온도 : $80^{\circ}C$ (b) 환화 탈수제의 몰비 : SMA내 anhydride/acetic anhydride/sodium acetate/triethyl amino = 1.0/2.0/0.2/1.1. 생성된 imide-modified SMA (SMI) 시료들은 이미드화도가 증가됨에 따라 $T_g$가 증가하였으나 그 변화 정도는 크지 않았다. SMI의 $T_g$는 이미드화에 사용된 아민의 종류에 따라 aniline < p-toluidine < p-chloroaniline의 순으로 $T_g$가 증가하였다.

Keywords