Ozonolysis by High Voltage Power Supply to the Melt-Extrudates of Admicelled Rubber and Natural Rubber

Angkana Pongpilaipruet; Rathanawan Magaraphan

doi:10.4028/www.scientific.net/AMR.747.459

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 747Ozonolysis by High Voltage Power Supply to the...

Ozonolysis by High Voltage Power Supply to the Melt-Extrudates of Admicelled Rubber and Natural Rubber

Abstract:

Ozone (O₃) is created when diatomic oxygen (O₂) is exposed to an electrical field or ultraviolet light. The reaction occurring between double bonds in the unsaturated elastomer chain of natural rubber (NR) and O₃ is known as ozonolysis which in turn results in a variety of products. The end result of these reactions is polymer chain scission. In this study, NR was employed as a core substrate for admicellar polymerization of pyrrole (Py) and methyl methacrylate (MMA). Ozonolysis that was studied by using a high voltage power supply connected to a capillary rheometer. These melt extrudates were then subjected to the ozonolysis at a voltage of 9 kV. The effect of ozonolysis at extrude conditions on the chain scission of both extrudates was investigated by melt flow rate measurement (MFR) and Fourier transform infrared spectroscopy. The admicelled rubber showed smaller in percent change of MFR and intensity of changed structure from ozonolysis which suggesting better ozone resistance of the admicelled rubber. Moreover, PMMA-NR showed better ozone stability than PPy-NR.

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Periodical:

Advanced Materials Research (Volume 747)

Pages:

459-462

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.747.459

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Online since:

August 2013

Authors:

Angkana Pongpilaipruet, Rathanawan Magaraphan

Keywords:

Admicellar Polymerization, Natural Rubber Modification, Ozonolysis, Poly(methyl methacrylate) (PMMA), Polypyrrole

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References

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