Polymerization of Methyl Methacrylate by Charge-Transfer Mechanism with Amines and Carbon Tetrachloride |
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Authors: | N N Dass A K Gogoi |
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Institution: | Department of Chemistry , Dibrugarh University , Dibrugarh, 786004, Assam, India |
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Abstract: | The charge-transfer complex formed between an amine and carbon tetrachloride can initiate the polymerization of vinyl monomers in a nonaqueous solvent such as dimethylsulfoxide. Here we use cyclopentylamine (CPA) and heptylamine (HA) as the donor compounds for charge-transfer initiation of the polymerization of methl methacrylate (MMA). The rate of polymerization Rp = kMMA]1 amine]0.5 CCl4]0.5 when CCl4] amine] ≤ 1; when CCl4] amine] < 1, Rp becomes independent of CCl4] and Rp = kMMA]1.5 amine]0.5. The average constant at 60°C for the polymerization of MMA in terms of monomer were (1.66 ± 0.03) × 10?5 and (1.46 ± 0.04) × 10?5 s?1 with CPA and HA, respectively, when CCl4] amine] ≤ 1, and (1.16 ± 0.04) × 10?5 and (1.39 ± 0.08) × 10?1 L/mol·s when CCl4]/amine] < 1. |
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Keywords: | PAN fibers shrinkage skin-core morphology tensile strength |
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