Rheological properties of calcium silicate‐filled isotactic polypropylene | Zendy

Maiti S. N. | Zendy; Singh Gurunam | Zendy; Nordin Ibrahim Mohd. | Zendy

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Rheological properties of calcium silicate‐filled isotactic polypropylene

Author(s) -

Maiti S. N.,

Singh Gurunam,

Nordin Ibrahim Mohd.

Publication year - 2002

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.11539

Subject(s) - rheology , materials science , composite material , silicate , tacticity , shear thinning , viscosity , shear rate , calcium silicate , polypropylene , filler (materials) , polymer , chemical engineering , polymerization , engineering

The melt rheological behavior of calcium silicate‐filled isotactic polypropylene, with filler volume contents of 0–17.8%, was determined at 493 K. The composites followed the power law in shear stress versus shear rate variations and were shear thinning. Initially, apparent melt viscosity decreased until a critical filler volume content of 8.5% was reached. However, on further increase in calcium silicate concentration, apparent melt viscosity increased. Melt elasticity also showed an initial decrease until 8.5% filler content was reached and then an increase beyond this filler content. Surface treatment of calcium silicate with a titanate coupling agent, LICA 38, modified the rheological properties because of the plasticizing/lubricating effect of LICA 38. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1511–1518, 2003

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