Artículos de revistas
Bulk modification of styrene-butadiene-styrene triblock copolymer with maleic anhydride
Registro en:
Journal Of Applied Polymer Science. John Wiley & Sons Inc, v. 83, n. 13, n. 2953, n. 2960, 2002.
0021-8995
WOS:000173408100027
10.1002/app.10355
Autor
Wilhelm, HM
Felisberti, MI
Institución
Resumen
The bulk modification of SBS rubber with maieic anhydride in a mixing chamber of a Haake rheomixer was studied. The effect of temperature, maleic anhydride, and benzoyl peroxide concentrations on the grafting efficiency was evaluated. High grafting efficiency was achieved when the ratio of peroxide and maleic anhydride concentration was high. On the other hand, on this condition high insoluble fraction was generated. The addition of a diamine, 4,4'-diaminediphenylmethane to the reaction mixture minimizes the amount of insoluble polymer. However, the grafted MAH content also decreases. The graft copolymer was characterized by infrared spectroscopy and the grafting extension was determined by titration. (C) 2002 John Wiley Sons, Inc. 83 13 2953 2960