《Table 1 Yield and molecular weight (Mw) of the carborane-containing fluorinated polyesters (CFPET-1

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《"Synthesis and Characterization of Fluorinated Polyurethane Containing Carborane in the Main Chain: Thermal, Mechanical and Chemical Resistance Properties"》

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a Estimated by gel permeation chromatograph（GPC）in THF on the basis of polystyrene calibration.

Carborane-containing fluorinated polyesters（CFPET-1 and CFPET-2）were synthesized via the Steglich esterification of carboxyl terminated liquid fluorine elastomer（LFE）with corresponding carborane diols（CDO-1 and CDO-2）according to the synthetic routes shown in Scheme 1.Dicyclohexylcarbodiimide（DCC）and 4-dimethylamino pyridine（DMAP）were used as the dehydrating agent and the catalyst，respectively.For the subsequent synthesis of polyurethanes，the terminal hydroxyl groups of polyesters were needed，so after carboxyl terminated liquid fluorine elastomer（LFE）reacted with carborane diols in the molar ratio of 1/1，another 0.08 mmol of carborane diol was added into the reaction system.Finally，the carborane-containing hydroxyl-terminated fluorinated polyester was obtained.The terminated hydroxyl groups could further react with HDI trimer to form CFPUs.The yield and molecular weight（Mw）of the fluorinated polyesters are listed in Table 1.