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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2002
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46413505011 |
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Table of Contents:
- The photoacoustic spectroscopy applied in the characterization of the cross-linking process in polymeric materials D. T. Dias A. N. Medina M. L. Baesso A. C. Bento M. F. Porto A. F. Rubira Física, Astronomía y Matemáticas In this work we used the Photoacoustic Spectroscopy (PAS) to evaluate the crosslinking of the copolymer from ethylene vinyl trimethoxysilane (EVS) and the grafted vinyl trimethoxysilane (VTS) on low density polyethylene (LDPE). PAS is used for sounding the overtone bands and stretching frequencies combinations of the groupings -Si-OH, =CH2, -CH3 and -CH2 -CH3, in the near and medium infrared range. The samples were typically prepared with 3%, 5% and 7% of catalyst and crosslinked in the temperatures of 70, 80 and 90ºC. Using the overtone bands of -OH groups the PAS shows the optimum combination, pointing a better crosslinking effect for 80ºC and in the range 5% to 7% of catalyst, typically. 2002 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413505011 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2B Vol.32