Viscoelastic Properties of Polypropylene Reinforced with Mica in Tα and Tαc Transition Zones. (31st July 2011)

• Record Type: Journal Article
• Authors: Farzaneh, S.; Tcharkhtchi, A.
• Other Names: Ade Harald W. Academic Editor.
• Is Part Of: International journal of polymer science. Volume 2011(2011)
• Publication Date: 2011-07-31
• Subjects: Polymers -- Periodicals; Polymers; Periodicals; 547.7
• DOI: 10.1155/2011/427095
• Languages: English
• ISSNs: 1687-9422

Abstract

Abstract : The viscoelastic properties of mica-reinforced polypropylene (PP) was studied in temperature range between −30 ° C and 120 ° C. WLF equation permits determining the free volume fraction in α and αc transitions regions. It was shown that the value of this parameter is lower for αc transition, indicating that the free volume and thermal expansion of α region is more than that of αc region. At a 40% loading level, it was shown that the storage and loss modulus of mica-filled PP increases dramatically (in comparison with the pure polypropylene). The relative modulus does not change significantly at glassy state but it increases for the temperature higher than T g . It was also shown that mica does not affect the glass transition temperature but results in an increase in αc transition.