Spinnability and rheological properties of sols derived from Si(OC₂H₅)₄ and Zr(O-nC₃H₇)₄solutions

• 발행기관: 강원대학교 산업기술연구소
• 저자명: 신대용(SHIN DAE YONG) 한상목(HAN SANG MOK)
• 간행물 정보: 『산업기술연구』vol.20, 1~8쪽, 전체 8쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2000.09.30

영문 초록

The shape of the polymers in the mixed alkoxide solutions of Si(OC2H5)4 and Zr(n-OC3H7)4 with various water contents(1, 2, 4, and 8 in molar ratio to alkoxide, r) and catalysts was examined by rheological measurements, and is relation with fiber drawing behavior of the solutions was described. It was found that fibers could be drawn in the viscosity range 1~100 P from the acid-catalyzed solutions with lower water contents of the molar ratio H2O/alkoxide, r≤2. On the other hand, no fiber could be drawn from the acid-catalyzed solutions including a large amount of water(r≥4) and the base-catalyzed solutions. The relation between the intrinsic viscosity [η] and number average molecular weight Mn, namely [η] = KMnα, has shown that the acid-catalyzed spinnable solution (r = 1 and 2) had linear polymers where the exponent a’s were about 0.56 and 0.81, wheres non-spinnable solutions (r = 4 and 8) had three dimensional network polymers or spherical particles where the exponent a’s were 0.41-0.51 and 0.35.

목차

Abstract

1. Introduction

2. Experimental Procedure

3. Results and Discussion

4. Conclusion

References

키워드

졸-겔법 방사성 섬유 점성 분자량 sol-gel method spinnability fiber viscosity molecular weight