Department of Polymer Science and Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si, Gyeonggi-do 16890, Korea
단국대학교 고분자공학과
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The effects of chain extender on the anisotropy and chain orientation behaviors of nylon 6/polyketone (PA 6/PK) blends were studied. FTIR absorption results show that the hydrogen bonding between C=O in PK and NH in PA 6 was developed in PA 6/PK blends. It was found that the hydrogen bonding was promoted by adding the chain extender causing the chain branch to PA 6 chain. The hydrogen bonding in the PA 6/PK blends prevented the crystallization and, at the same time, increased the anisotropic character in the PA 6 chain. As a result, the optical light leakage was observed with the crossed polarized plats and the interference pattern was found. Orientation behaviors of PA 6/PK blends were improved by blending with PK having relatively better orientation characteristic compare with PA 6 and the further improvement was made by hydrogen bonding which occurred between PA 6 and PK by using the chain extender.
나일론 6/폴리케톤(PA 6/PK) 블렌드에 사슬연장제 첨가가 블렌드 이방성과 사슬 배향특성에 미치는 영향을 살펴보았다. FTIR 흡수 피크 변화로써 PA 6/PK 블렌드에 PK의 C=O기와 PA 6의 NH기 상호 간 수소결합을 확인할 수 있었다. 사슬연장제 첨가에 의하여 발현된 PA 6 사슬 가지화는 PK와의 수소 결합을 촉진시킴을 알 수 있었다. PA 6와 PK의 수소결합은 PA 6/PK 블렌드 결정화를 방해함과 동시에 PA 6 사슬 이방성을 증가시킨다. 그 결과, 복굴절을 증가시켜 교차 편광판에서 광학적 빛 샘 현상으로 빛 간섭이 발생하였다. PA 6에 비하여 상대적으로 우수한 PK 사슬 배향성으로 PA 6/PK 블렌드 배향 특성이 향상되며 사슬 연장제에 의한 PK와의 수소 결합 증가로 배향 특성이 더 개선됨을 확인하였다.
Keywords: nylon 6, polyketone, anisotropy, chain extender, birefringence, orientation.
2022; 46(6): 744-751
Published online Nov 25, 2022
Department of Polymer Science and Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si, Gyeonggi-do 16890, Korea