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Comparison of maleic anhydride grafting onto powder and granular polypropylene in the melt by reactive extrusion
Article first published online: 5 APR 2004
DOI: 10.1002/app.20304
Copyright © 2004 Wiley Periodicals, Inc.
1097-4628/asset/cover.gif?v=1&s=e26a028b9ea53b1db3bdcdf154d4f4fab00f90a5 "Journal of Applied Polymer Science")
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How to Cite
Güldoğan, Y., Eğri, S., Rzaev, Z. M. O. and Pişkin, E. (2004), Comparison of maleic anhydride grafting onto powder and granular polypropylene in the melt by reactive extrusion. J. Appl. Polym. Sci., 92: 3675–3684. doi: 10.1002/app.20304
Publication History
- Issue published online: 5 APR 2004
- Article first published online: 5 APR 2004
- Manuscript Accepted: 13 NOV 2003
- Manuscript Received: 25 AUG 2003
Funded by
- Turkish Academy of Sciences
- State Department. Grant Number: 02 K 120 290-16
- POLINAS Plastic Industry & Commercial Co.
- Turkish Scientific Technical Research Council. Grant Number: MİSAG-158
- Abstract
- Article
- References
- Cited By
Keywords:
- poly(propylene) (PP);
- melt;
- reactive extrusion
Abstract
The grafting of powder and granular polypropylene (PP) with maleic anhydride (MA) was investigated in a reactive extrusion process with dicumyl peroxide (DCP) as an initiator. The effects of the MA and DCP contents in the feed on grafting were investigated. Under the experimental conditions applied in this study, the grafted monomer unit content was varied from 0.023 to 0.5%. The MA grafting efficiency of powder PP was higher than that obtained for the granular form of PP. In general, the grafting degree first increased with the MA or DCP content in the feed, then reached a maximum value, and finally decreased because of several possible alternative reactions during the grafting. The grafting of powder PP was more successful because of better initial mixing and less diffusional resistance during the grafting. An increase in the MA content in the feed caused significant reductions in the melt-flow index of the graft copolymers. The results obtained with Fourier transform infrared, differential scanning calorimetry, and X-ray powder diffraction analyses indicated that the structure, macrotacticity, crystallinity, crystallization, and thermal behavior of PP changed with grafting and depended on the grafting degree. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 3675–3684, 2004