Effect of pre-heat treatment on crystalline structure of high performance polyethylene
In the present work a differential scanning calorimetry technique has been used to investigate the effect of annealing on the thermal properties of high performance polyethylene fibers (HPPE). The fibers were annealing under unconstrained conditions, at 70, 100, 130℃ for periods 30 min, respectively. Double-melting endotherms are the characteristic melting behaviors of HPPE fibers. The crystalline lattice would be normalized when fiber was heated because partial crystal exist fiber interior, so the melting temperatures are increased. The crystalline structure transformation of high performance polyethylene was also characterized by X-ray diffraction experiments. The characterization results showed that the pre-heat induced an increase in the crystallinity, onset and melting temperature of HPPE fibers. Dimension of the orthorhombic structure in the 110 and 200 become larger with the annealing temperature of HPPE fibers increasing.
Junjie Liu Weidong Yu
College of Textile, Donghua University, Shanghai, 201620, P.R.China College of Textile, Donghua University, Shanghai, 201620, P.R.China Wuhan University of Science and
国际会议
上海
英文
760-762
2009-05-27（万方平台首次上网日期，不代表论文的发表时间）