Study of the relationship between characteristics of aramid fibrids and mechanical property of aramid paper using DSC

Huifang Zhao; Yinbang Zhu; Lizheng Sha

doi:10.1515/epoly-2013-0063

Article

Study of the relationship between characteristics of aramid fibrids and mechanical property of aramid paper using DSC

, and

Published/Copyright: February 24, 2014

Published by

Become an author with De Gruyter Brill

Submit Manuscript Author Information

From the journal e-Polymers Volume 14 Issue 2

Abstract

Fiber classification of aramid fibrids was carried out using a Bauer-McNett fiber classifier, and the molecular weight and thermal properties of different sizes of aramid fibrids were determined with viscometry and differential scanning calorimetry (DSC), respectively. Aramid handsheets were made from different sizes of aramid fibrids and aramid short fibers, and the relationship between mechanical strength of aramid handsheets and thermal properties of aramid fibrids was examined. In addition, aramid papers from four different sources were also investigated to elucidate the relationship between their thermal properties and mechanical strength. It was found that aramid fibrids passing through 30-mesh screens and remaining on 50-mesh screens and aramid fibrids with narrower molecular weight distribution are suitable for the production of high-strength aramid papers. Lower crystallinity and wider molecular weight distribution are important contributors to the lower mechanical strength of domestic aramid paper when compared to that of Nomex paper.

Keywords: aramid fibrid; aramid paper; average molecular weight; cold crystallization; glass transition temperature

Corresponding author: Huifang Zhao, School of Light Industry, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, 310023, People’s Republic of China, e-mail: zhf9966@163.com

Acknowledgments

We would like to express our great thanks to the Cross-disciplinary Pre-research Special Fund of Zhejiang University of Science and Technology (2011JC08Y) for financial support.

References

1. Jung H, Klein P, Kampschulte U, inventors; Hoechst AG, assignee. Preparation of fiber-forming meta-aramids. US patent 5,432,255. 1995.Search in Google Scholar

2. Ohba A, Yoshitomi T, Iwasaki H, Takiue K, inventors; Teijin Limited, assignee. Process for producing meta-aromatic polyamide fiber. US patent 6,569,987. 2003.Search in Google Scholar

3. Merriman EA. Aramid fibrid processing and properties for industrial papers. TAPPI J. 1984;67(8):66–8.Search in Google Scholar

4. Sha LZ, Zhao HF. Effect of surface modification process conditions on properties of aramid paper. Polymer (Korea) 2013;37(2):196–203.Search in Google Scholar

5. Gross GC, inventor; E.I. Du Pont de Nemours and Company, assignee. Synthetic paper structure of aromatic polyamides. US patent 3,756,908. 1973.Search in Google Scholar

6. Bhatia A. Aramid papers with improved dimensional stability. In: Electrical Electronics Insulation Conference, Sept 18–21, 1995, Rosemont, IL, USA; 1995. pp. 409–10.Search in Google Scholar

7. Forsten HH, Khan S, inventors; E.I. Du Pont de Nemours and Company, assignee. Flame barrier compositions and their use. US patent 6,312,561. 2001.Search in Google Scholar

8. Nomoto K, inventor; Showa Aircraft Industry Co., Ltd, assignee. Aramid honeycombs and a method for producing the same. US patent 6,544,622B1. 2003.Search in Google Scholar

9. Homan B, Kinsley JR, inventors; FiberMark Inc., assignee. High temperature paper containing aramid component. US patent 2004/0140072A1. 2004.Search in Google Scholar

10. Hesler LJ, Park, SC, inventors; E.I. Du Pont de Nemours and Company, assignee. Aramid papers containing aramid paper pulp. US patent 5,026,456. 1991.Search in Google Scholar

11. Zhao HF, Zhang MY, Zhang SF, Lu JB. Influence of fiber characteristics and manufacturing process on the structure and properties of aramid paper. Polym Plast Technol Eng. 2012;51(2):134–9.Search in Google Scholar

12. Jenkins MJ, Harrison KL. The effect of molecular weight on the crystallization kinetics of polycaprolactone. Polym Adv Technol. 2006;17(6):474–8.Search in Google Scholar

13. Chen XD, Hou G, Chen YJ, Yang K, Dong YP, Zhou H. Effect of molecular weight on crystallization, melting behavior and morphology of poly(trimethylene terephalate). Polym Test. 2007;26(2):144–53.Search in Google Scholar

14. Wang XS, Deyue Y, Tian GH, Li XG. Effect of molecular weight on crystallization and melting of poly(trimethylene terephthalate).:1. Isothermal and dynamic crystallization. Polym Eng Sci. 2001;41(10):1655–64.Search in Google Scholar

15. Marigo A, Marega C, Causin V, Ferra P. Influence of thermal treatments, molecular weight distribution on the crystallization of β-isotactic polypropylene. J Appl Polym Sci. 2004;91(2):1008–12.Search in Google Scholar

16. Suwa T, Takehisa M, Machi S. Melting and crystallization behavior of poly(tetrafluoroethylene). New method for molecular weight measurement of poly(tetrafluoroethylene) using a differential scanning calorimeter. J Appl Polym Sci. 1973;17(11):3253–7.Search in Google Scholar

17. He F, Zhang MY, Zhang SF. Studies on structure and pyrolysis properties of paper-based aramid fiber. China Pulp Pap Ind. 2008;29(18):25–8.Search in Google Scholar

18. Li JB, Zhang MY, Xiu HJ. Effect of hot press process on properties of aramid fiber. Pap Papermaking 2007;26(3):30–2.Search in Google Scholar

19. TAPPI Standard, T233 cm-06. Fiber length of pulp by classification, 2006.Search in Google Scholar

20. Wang LL, Chen L, Hu PP, Qian C, Liu ZF. Study on the viscosity performance of m-phenylene isophthalamide (PMIA) dope. J Donghua Univ. 2006;32(1):15–9.Search in Google Scholar

21. Harwood D, Aoki H, Lee YD, Fellers JF, White JL. Solution and rheological properties of poly(m-phenylene isophtalamide) in dimethylacetamide/LiCl. J Appl Polym Sci. 1979;23(7):2155–68.Search in Google Scholar

22. TAPPI Standard, T494 om-01. Tensile properties of paper and paperboard (using constant rate of elongation apparatus), 2001.Search in Google Scholar

23. TAPPI Standard,T414 om-04. Internal tearing resistance of paper (Elmendorf-type method), 2004.Search in Google Scholar

24. Dai XF, Cao YT, You XL, Liu ZF. Effect of synthesis process on inherent viscosity of PPTA. J Chin Syn Fiber Ind. 2005;28(3):28–31.Search in Google Scholar

25. You XL, Liu ZF. Development on technology of PPTA-pulp preparation. J Polym Mater Sci Eng. 2003;19(3):45–8.Search in Google Scholar

26. Cano RJ, Jensen BJ. Effect of molecular weight on processing and adhesive properties of the phenylethynyl-terminated polyimide LARC™- PETI-5. J Adhesion 1997;60(1):113–23.Search in Google Scholar

27. Liu ZH, Hatakeyama LZ, Chen XS, editors. Polymer calorimetry determination. Beijing: Chemical Industry Press; 2002. p. 118.Search in Google Scholar

28. Wu LB, Hou HB. Isothermal cold crystallization and melting behaviors of poly (l-lactic acid)s prepared by melt polycondensation. J Appl Polym Sci. 2010;115(2):702–8.Search in Google Scholar

Received: 2013-11-14

Accepted: 2014-1-31

Published Online: 2014-02-24

Published in Print: 2014-03-01

You are currently not able to access this content.

Articles in the same Issue

https://doi.org/10.1515/epoly-2013-0063

Keywords for this article

aramid fibrid; aramid paper; average molecular weight; cold crystallization; glass transition temperature