Chlorination of low-molecular-weight Euphorbia lactiflua natural rubber |
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| Authors: | Sara Gnecco Amalia Pooley Claudia Lefimil Carolina Pino Lissette Valenzuela |
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| Affiliation: | (1) Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción, Chile, CL;(2) Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción, Chile, CL |
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| Abstract: | The chlorination of low-molecular-weight natural rubber isolated from Euphorbia lactiflua latex (LMWER) was accomplished. The reaction was performed by using Cl2(g), and CH2Cl2 or CCl4 solvents. Different temperatures, reaction times and Cl2 to isoprene ratio were used. The products were characterized by elementary analysis, infrared spectroscopy (FT-IR), 1H nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The maximum
chlorination reached was 59.9%. The properties were found to be comparable with chlorinated rubber obtained from liquid natural
rubber (LNR).
Received: 13 June 1997/Revised: 15 September 1997/Accepted: 23 September 1997 |
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