Crystallization Kinetics of Miscible Polymer Blend -Polyethylene and Atactic Polypropylene Blend-

상용성 고분자 블렌드의 결정화 속도 -Polyethylene과 Atactic Polypropylene 혼합체-

Crystallization kinetics of polyethylene(PE) from the blends of PE and atactic polyproplene(APP) were investigated. The isothermal crystallizations were determined with differential scanning calorimetry(DSC). The Avrami equation was employed to analyze the isothermal crystallization kinetics at three different temperatures, 105$^{\circ}C$, 108$^{\circ}C$ and 111$^{\circ}C$. It was found that the value of Avrami constant(k) increased markedly with APP concentration. However, Avrami exponent(n) decreased considerably as APP concentration increased. It is suggested from the results that, for these blends, the crystallization proceeds by heterogeneous nucleation.