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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Assessment of the utilization of different peroxide dispersion media on the controlled degradation of polypropylene

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Author(s):
Munoz, P. A. R. [1, 2] ; Bettini, S. H. P. [1]
Total Authors: 2
Affiliation:
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Paulo - Brazil
[2] Ctr Univ FEI, Dept Mech Engn, BR-09895090 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Applied Polymer Science; v. 127, n. 1, p. 87-95, JAN 5 2013.
Web of Science Citations: 5
Abstract

A two-step investigation of polypropylene-controlled degradation was performed. First the controlled degradation of polypropylene was investigated by assessing the effects of using dicumyl peroxide (DCP) and 2,5-dimethyl-2,5-di(t-butylperoxy) hexane (DHBP) in different suspensions (neat, calcium carbonate, and organically modified montmorillonite). The second part of this research was performed according to a factorial design at two levels (22 experimental design) with center point, in which peroxide concentration and reaction time were studied. Polypropylene degradation was assessed by melt flow rate (MFR) and parallel plate rheometry. Results showed that DCP presented higher molar efficiency in polypropylene degradation reactions in relation to DHBP; likely due to radical recombination reactions. The results also indicate that clay may catalyze the recombination reactions of polypropylene radicals. (C) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2012 (AU)

FAPESP's process: 08/04334-2 - Grafting of Maleic Anhydride onto Polypropylene by Reactive Processing, in Presence of Nanoparticles.
Grantee:Silvia Helena Prado Bettini
Support Opportunities: Regular Research Grants