Low molecular weight poly(vinyl alcohol) surfactant modified(poly vinyl alcohol mono thiol : PVALT ) having a thiol group at one end were synthesized using thiolacetic acid as a chain transfer agent. The dependence of polymerization recipes and conditions of PVALT on the degree of polymerization was investigated. The structure of the synthesized polymeric surfactant(PVALT) was confirmed by FTIR. The strong characteristic absoption bands for thiol functional group appeared at 2550㎝_-1(3.92㎛). The number average degree of Polymerization(DP_n) were measured by viscometric method. In addition, the thiol contents was determined by means of the Wij's titration method. Maximum thiol contents was found to be 0.147 m-equiv./g PVALT at 98 of DP_n.

연쇄이동제로써 티올초산을 사용하여 말단에 티올기를 함유하는 저분자량의 폴리비닐알코올변성 계면활성제(poly viny1 alcohol mono thiol : PVALT)를 합성하고 합성처방과 반응조건에 따른 PVALT의 중합도 의존도를 규명하였다. 합성된 중합물(PVALT)의 구조는 적외선분광기로써 확인하였는데 관능기인 티올이 2550 cm^-1(3.92 ㎛)에서 관찰되었으며 그 수평균분자은 점도법으로써 구하였다. 아울러 수평균중합도 98에서의 최대 티올함량은 iodometry 법으로 측정한 결과 0.147 m-equiv./g PVALT로 판명되었다.

Keywords: surfactant; radical polymerization; chain transfer agent; poly(vinyl alcohol); poly(vinyl acetate)