Thermal properties in strong hydrogen bonding systems composed of poly(vinyl alcohol), polyethyleneimine, and graphene oxide

• 영문명: Thermal properties in strong hydrogen bonding systems composed of poly(vinyl alcohol), polyethyleneimine, and graphene oxide
• 발행기관: 한국탄소학회
• 저자명: Sua Choi Duck Kun Hwang and Heon Sang Lee
• 간행물 정보: 『Carbon Letters』제15권 제4호, 282~289쪽, 전체 8쪽
• 주제분류: 자연과학 > 자연과학일반
• 파일형태: PDF
• 발행일자: 2014.10.31

영문 초록

Blends of poly(vinyl alcohol) (PVA), polyethyleneimine (PEI), and graphene oxide (GO) were prepared by solution casting method. Calorimetric thermal properties of the blends were investigated. The Tgs of PVA/PEI blends were higher than the Tgs of either of the component polymers at low concentrations of PEI. These abnormal increases of Tgs may be due to the negative entropy of mixing which is associated with strong hydrogen bonding between PVA and PEI. The degree of depression of s was not reduced by the negative entropy of mixing, since strong hydrogen bonding also causes an increase in the magnitude of negative c between PVA and PEI. The Tg of PVA was increased significantly by adding 0.7 wt.% GO into PVA. The magnitude of negative c was increased by adding GO into the blends of PVA and PEI

목차

1. Introduction

2. Experimental Section

3. Results and Discussion

4. Conclusions

Acknowledgments

References

키워드

poly(vinyl alcohol) polyethyleneimine graphene oxide calorimetric thermal properties strong hydrogen bonding