The Criterion of Particle-Induced Cracking of Filled Polymers

Sergey Bazhenov, Galina Goncharuk

Abstract


Failure of high density polyethylene, low density polyethylene, and polypropylene filled with grinded rubber particles was studied. In tension, particles debond from the matrix and initiate appearance of pores. Small particles lead to formation of elliptical pores. In contrast, large particles initiate appearance of diamond cracks leading to fast failure of filled polymer. In the intermediate case elliptical pore gradually transforms into diamond cracks. The diamond crack appears when the elongation of an elliptical pore reaches the critical crack tip opening of the unfilled polymer. The size D of filler particles should be lower than Dc = GIc/[(ld - 1)?d)], where GIc is the fracture toughness, sd - the draw stress and ld - the natural draw ratio of the matrix in the neck. Ductile or brittle behavior of filled polymer depends on whether the polymer yields uniformly or with necking. If the neck does not appear, filler particles usually do not initiate brittle fracture. In contrast, filled polymers, yielding with necking, often are brittle.


Full Text: PDF DOI: 10.5539/jmsr.v3n1p77

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.

Journal of Materials Science Research   ISSN 1927-0585 (Print)   ISSN 1927-0593 (Online)

Copyright © Canadian Center of Science and Education

To make sure that you can receive messages from us, please add the 'ccsenet.org' domain to your e-mail 'safe list'. If you do not receive e-mail in your 'inbox', check your 'bulk mail' or 'junk mail' folders.

------------------------------------------------------------------------------------------------------------------------------

images_120. proquest_logo_120 doaj_logo_new_120