CONFIGURATION OF PMIA FIBRID AND ITS EFFECT ON ARAMID SHEET
Poly(m-phenylene isophthalamide)(PMIA) fibrids were classified and their structure and fiber morphology were characterized by their average fiber length, crystallinity, molecular weight, specific surface area and beating degree. This research focused on the effects of PMIA fibrids on the mechanical properties of aramid sheets. The results showed that the PMIA fibrids retained on 50 sieve mesh and 200 sieve mesh took up the largest proportion. The fibrids retained on small mesh number have larger average fiber length, lower specific surface area, lower beating degree, and larger molecular weight. PMIA fibrids are amorphous materials and their crystallinity are very low. The density and strength of uncalendered aramid sheets were relatively low, and specific surface area and beating degree of PMIA fibrids were the main influencing factors for uncalendered aramid sheet, but molecular weight and crystallinity of PMIA fibrids were the main influencing factors for calendered aramid sheets. PMIA fibrids with larger specific surface area and higher beating degree are suitable to produce uncalendered aramid sheets and PMIA fibrids with medium molecular weight are suitable to produce high-strength calendered aramid sheets.
PMIA fibrid classification crystallinity molecular weight specific surface
Zhao Huifang Zhang Meiyun Lu Jinbei
Key Laboratory of Paper Technology and Specialty Paper Development of Shaanxi, Shaanxi University of Key Laboratory of Paper Technology and Specialty Paper Development of Shaanxi, Shaanxi University of
国际会议
广州
英文
1582-1585
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）