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Control of molecular weight distribution in polycondensation polymers 2. Poly(ether ketone) synthesis |
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| Authors: | Yuji Shibasaki Ritsuko Nagahata Mitsuru Ueda |
| Institution: | a Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan b National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565, Japan |
| Abstract: | Synthesis of aromatic poly(ether ketone) (3) with a narrow molecular weight distribution (Mw/Mn) was investigated via polycondensation. Mns of 3 could be controlled varying the feed ratio of monomer (1) and initiator (2) maintaining relatively narrow Mw/Mns (<1.3). The kinetics of polycondensation obeyed a first-order relationship between polycondensation time and -(1/2]0) ln(1]/1]0), and the rate of polycondensation was estimated as 2.57 mol−1 L h−1. MALDI-TOF mass analysis of 3 indicated that polycondensation should proceed via chain growth manner to give 3 having an initiator unit in each chain end. |
| Keywords: | Controlled polymerization Polycondensation Poly(ether ketones) Molecular weight distribution Condensative chain polymerization |
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