Nonisothermal crystallization kinetics and melting behavior of bimodal medium density polyethylene/low density polyethylene blends

Nonisothermal crystallization kinetics and melting behavior of bimodal-medium-density- polyethylene (BMDPE) and the blends of BMDPE/LDPE were studied using differential scanning calorimetry (DSC) at various scanning rates. The Avrami analysis modified by Jeziorny and a method developed by Mo were em...

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Bibliographic Details
Published in:European polymer journal 2004-07, Vol.40 (7), p.1533-1539
Main Authors: Gao, Jun-gang, Yu, Mao-shang, Li, Zhi-Ting
Format: Article
Language:English
Subjects:
Applied sciences
Bimodal medium density polyethylene
Blends
Crystallization
Exact sciences and technology
Low-density polyethylene
Nonisothermal crystallization kinetics
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Summary:Nonisothermal crystallization kinetics and melting behavior of bimodal-medium-density- polyethylene (BMDPE) and the blends of BMDPE/LDPE were studied using differential scanning calorimetry (DSC) at various scanning rates. The Avrami analysis modified by Jeziorny and a method developed by Mo were employed to describe the nonisothermal crystallization process of BMDPE. The BMDPE DSC data were analyzed by the theory of Ozawa. Kinetic parameters such as the Avrami exponent ( n), the kinetic crystallization rate constant ( Z c), the peak temperatures ( T p) and the half-time of crystallization ( t 1/2) etc. were determined at various scanning rates. The appearance of double melting peaks and the double crystallization peaks in the heating and cooling DSC curves of BMDPE/LDPE blends indicated that the BMDPE and LDPE could crystallize respectively.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2004.02.008