| 초록 |
Thermoplastic poly(ether ester) elastomers (TPEEs) are considered as an important class of thermoplastic elastomers produced by step-growth polymerization. So far TPEEs have been synthesized in the presence of metal catalysts such as titanium tetrabutoxide, tin complexes etc. Though the metal catalysts are effective at being highly selective towards producing the desired product, designing metal free catalysts are being more significant and environmentally friendly. Hence, herein we have designed certain acid-base organo-catalysts to enhance the performance of hard segment formation in TPEE synthesis. The acid-base organo-catalyst is the combination of various ratio of organic acid and base. A series of hard segment of TPEEs have been synthesized by using 1,6-hexanediol (1,6-HDO) and dimethyl terephthalate (DMT) by varying the catalytic ratio (organic bases/organic acids ratio) towards 1:1 to 1:3. The reactivity of obtained TPEEs has been monitored by 1H NMR and GPC. |
