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Morphological changes induced by the chloromethylation reaction as a function of the chloromethylation conditions with TMCS/(CH2O)n

E. AVRAM1, E. S. DRAGAN1,* , G. E. IOANID1

Affiliation

  1. “Petru Poni” Institute of Macromolecular Chemistry, Romanian Academy,Gr. Ghica Voda Alley 41A, 700487Jassy, Romania

Abstract

Chloromethylation degree and morphological changes of some macroporous styrene-divinylbenzene (St-DVB) copolymers, with paraformaldehyde (CH2O)n/ trimethylchlorosilane (TMCS) as chloromethylation reagent and FeCl3 as catalyst, as a function of copolymer porosity, concentration of chloromethylation reagent and catalyst content were followed in the paper. An increase of the chloromethylation degree with the increase of both the St/(CH2O)n/TMCS molar ratio and the increase of the reagent concentration was found. Morphological changes, manifested in the increase of the specific surface area and the decrease of the average pore radius, accompanied the chloromethylation reaction comparative with the starting S-DVB copolymers, the level of changes being correlated with the chloromethylation conditions..

Keywords

Macroporous styrene-divinylbenzene copolymers, Chloromethylation reaction, Morphological characteristics.

Submitted at: Jan. 21, 2008
Accepted at: March 17, 2008

Citation

E. AVRAM, E. S. DRAGAN, G. E. IOANID, Morphological changes induced by the chloromethylation reaction as a function of the chloromethylation conditions with TMCS/(CH2O)n, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 3, pp. 613-617 (2008)