Rheological behavior of polyacrylonitrile and polyacrylonitrile/lignin blends

POLYMER

卷:111

Article

Liu, H. Clive^1,2  Tuan, Chia-Chi¹  Davijani, Amir A. Bakhtiary¹  Wang, Po-Hsiang¹  Chang, Huibin^1,2  Wong, Ching-Ping¹  Kumar, Satish^1,2 

[1] Georgia Inst Technol, Sch Mat Sci & Engn, 801 Ferst Dr NW,MRDC-1, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, Renewable Bioprod Inst, 500 10th St NW, Atlanta, GA 30332 USA

关键词: Polyacrylonitrile PAN;    Lignin;    Fiber;    Carbon fiber;    Rheology;   

DOI  :  10.1016/j.polymer.2017.01.043

来源: Elsevier

【 摘 要 】

Dynamic shear rheology study is conducted on the polyacrylonitirile (PAN) solution and composite solutions of PAN with up to 37.5 wt% annual plant lignin (APL) to address current barriers of PAN/lignin blend development as carbon fiber precursor. PAN/APL blends exhibit lower yield stresses, lower relaxation times, and lower viscosities than to PAN solution according to the dynamic frequency sweep measurements from -7 degrees C to 56 degrees C. Yet an increase of solution activation energy of flow is observed with the increasing lignin content in solution. This is attributed to the potential interactions of PAN and lignin. Solution loss tangents obtained from dynamic frequency sweeps between -7 degrees C and 56 degrees C at an oscillatory frequency of 100 rad/s is used to envision the effect of lignin on solution structure during fiber processing. (c)2017 Elsevier Ltd. All rights reserved.

【 授权许可】

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