Modification of polypropylene by organic peroxides

Hogt, A.H.; Meijer, J.; Jelenič, J.

doi:10.1007/978-94-009-1449-0_2

Cited by 31 publications

(11 citation statements)

References 145 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the peresters PE 4 -PE 8 , the amount of ester and acid functions grafted (A: 0.54 -0.66 per mole of perester) was similar to the one obtained using PE 3 (0.64) but higher than that with PE 1 (0.44). The grafts of acid entities-determined after saponification and acidification-in the same range for the peresters PE 3 -PE 8 , were higher than for the t-alkyl perpropanoates.…”

Section: Functionalization By Thermal Decomposition Of 3-(11-dimethysupporting

confidence: 66%

“…[1][2][3][4][5][6][7][8][9][10][11] To our knowledge, only the articles by Moore et al 12,13 have described the functionalization of polyolefins, polypropylene in this case, carried out by thermal decomposition of peroxyesters in the absence of any additive. Acid and ester functions were introduced onto polypropylene; one of functionalization mechanisms, invoked in the current study, was the combination of the macroradical, formed in the hydrogen abstraction from the polymer by one of the radicals produced in the decomposition of the perester, with the counterradical of this latter.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chemical modification of molten polyethylene by thermal decomposition of peroxyesters

Navarre¹,

Saule²,

Maillard³

2002

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:The functionalization of polyethylene was realized by the thermal decomposition of peroxyesters in molten polymer in the absence of any other additive. Ester and acid functions were introduced onto the polymer operating with various peroxyesters. This grafting resulted from the combination of a polymer radical, generated in the abstraction of a hydrogen from polyethylene by an alkoxy radical, with an acyloxy or carbon-centered radical arising from the perester. A complete methodology was set up to identify and to titrate the functions present onto the polyethylene and to determine the extent of crosslinked polymer.

show abstract

Section: Functionalization By Thermal Decomposition Of 3-(11-dimethysupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Chemical modification of molten polyethylene by thermal decomposition of peroxyesters

Navarre¹,

Saule²,

Maillard³

2002

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…However, such a Scheme 2 reaction would be more operative for the alkyl radicals arising from the persuccinates 18 because of the formation of a double bond conjugated with an ester. Taking this remark into account and the efficient ester function grafting on PE with a peroxide/acrylate system, [27][28][29][30] we can conclude that the functionalization by peroxysuccinic derivatives may originate from a mechanism other than the coupling previously advanced. 18 This analysis shows that it is actually very difficult to simply explain the obtained results.…”

Section: T-butyl 355-trimethylperoxyhexanoate (4)mentioning

confidence: 98%

Crosslinking of high‐density polyethylene in the presence of organic peroxides

Anbarasan

Babot

Maillard

2004

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:The crosslinking efficiency of various commercially available organic peroxides (dicumyl peroxide, O,O-t-butyl O-2-ethylhexylperoxycarbonate, t-butyl peroxybenzoate, t-butyl 3,5,5-trimethylperoxyhexanoate, and t-butyl 2-ethylperoxyhexanoate) was tested on high-density polyethylene (HDPE) in its molten state. The variations of the concentrations of the peroxides versus the crosslinking extent were plotted for these peroxides, and the values were compared. Dicumyl peroxide was found to be the best crosslinking agent for HDPE. The efficiency of the HDPE crosslinking with each peroxy derivative was analyzed on the basis of the behavior of the radicals generated from it.

show abstract

“…Investigations regarding such reactions have been carried out in equipment like torque rheometers, 1,3,[7][8][9] single screw extruders, 10 -12 and in twin screw extruders. 7,13,14 The organic peroxides are thermally unstable and undergo homolytic scission at the oxygen-oxygen bonds to form primary radicals at the processing conditions used. The radicals withdraw hydrogen atoms from the polypropylene chains, forming macroradicals on the polymer backbone, onto which, theoretically, the maleic anhydride is added, initiating the grafting process.…”

Section: Introductionmentioning

confidence: 99%

Grafting of maleic anhydride onto polypropylene by reactive processing. I. Effect of maleic anhydride and peroxide concentrations on the reaction

Bettini

Agnelli

1999

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

ABSTRACT:Grafting reactions were performed in a Haake torque rheometer, according to a central composite experimental design, where the maleic anhydride and peroxide concentrations, rotor speed, and reaction time were varied. The 27 formulations were analyzed by Fourier transformed infrared spectroscopy and melt-flow index measurements (MFI). An increase in peroxide concentration caused an increase in the percentage of reacted maleic anhydride and in MFI. The effect of initial maleic anhydride concentration presented different types of behavior, depending on the peroxide level.

show abstract

Modification of polypropylene by organic peroxides

Cited by 31 publications

References 145 publications

Chemical modification of molten polyethylene by thermal decomposition of peroxyesters

Chemical modification of molten polyethylene by thermal decomposition of peroxyesters

Crosslinking of high‐density polyethylene in the presence of organic peroxides

Grafting of maleic anhydride onto polypropylene by reactive processing. I. Effect of maleic anhydride and peroxide concentrations on the reaction

Contact Info

Product

Resources

About