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펜던트기

펜던트기(영어: pendant group) 또는 측기(測銷, 영어: side group)는 긴 분자의 골격 사슬에 부착된 분자 그룹이다. 보통, 이러한 분자는 중합체이다. 펜던트기는 올리고머도 중합체도 아니기 때문에 펜던트 사슬(곁사슬)과는 다르다.[1]

IUPAC 정의

펜던트기
측기
사슬에서 올리고머도 중합체도 아닌 분지.[2]

예를 들어, 페닐기폴리스티렌 사슬의 펜던트기이다.

아다만탄과 같은 크고 부피가 큰 펜던트기는 일반적으로 사슬이 서로 쉽게 미끄러지는 것을 방지하여 중합체의 유리 전이 온도(Tg)를 높인다. 짧은 알킬 펜던트기는 윤활 효과에 의해 유리 전이 온도를 낮출 수 있다.

각주

[편집]
  1. IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). 온라인 수정 버전: (2006–) "pendant group (side group)". doi 10.1351/goldbook.(({file))}Error in template * mandatory parameter missing (GoldBookRef): file
  2. “Glossary of basic terms in polymer science (IUPAC Recommendations 1996)”. 《Pure and Applied Chemistry》 68 (12): 2287–2311. 1996. doi:10.1351/pac199668122287. 
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펜던트기
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