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《Journal of Jilin University (Science Edition)》 1992-01
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Effect of Crystallization Conditions on Morphologh and Mechanical Properties of Polypropylene-Polyisobutylene Blends

Ma Rongtang (Department of Chemistry, Jilin University, Changchun) Riva F. and Martuscelli E. (Istituto di Ricerche su Tecnologia dei Polimeri e Reologia, CNR, Italy)  
Morphology and mechanical properties of polypropylene-polyisobutylene blends crystallized under different conditions were investigated and the influence of crystallization conditions and the composition of blends owere discussed. Compared with the specimen quenched in cold water, isothermal crystallized blends show a higher crystallinity, thicker lamalla and higher values of tensile strength and Young's modulus, and less toughness. The crystallinity and mechanical properties of polypropylene are decreased and poor respectively due to the addition of polyisobutylene.
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