Microstructural Developments of Poly (p-phenylene terephthalamide) Fibers During Heat Treatment Process: A Review

作者：Ahmed, Dawelbeit^*; Zhong Hongpeng; Kong Haijuan; Liu Jing; Ma Yua; Yu Muhuo

来源：Materials Research, 2014, 17(5): 1180-1200.

DOI：10.1590/1516-1439.250313

• heat treatment
• PPTA
• crystal structure
• mechanical properties
• microstructure

Poly (p-phenylene terephthalamide) fibers prepared by wet or dry-jet wet spinning processes have a notable response to very brief heat treatment (seconds) under tension. The modulus of the as-spun fiber can be greatly affected by the heat treatment conditions (temperature, tension and duration). The crystallite orientation and the fiber modulus will increase by this short-term heating under tension. Poly (p-phenylene terephthalamide) fibers have a very high molecular orientation (orientation angle 12-20 degrees). Kevlar((R)) and Twaron((R)) fibers are poly (p-phenylene terephthalamide) fibers. This review reports for PPTA fibers the heat treatment techniques, devices and its process conditions. It reports in details the structural relationships between the fiber properties which are influenced by the heat treatment process. In particular, focused deeply on the effect of the crystal structure and the morphology of the fibers on the mechanical properties of PPTA fibers.

• 出版日期2014-10
• 单位东华大学