Biphenyl Polyphosphonate, Method for Preparing the Same and Thermoplastic Resin Composition Including the Same

A method for preparing a biphenyl polyphosphonate represented by Formula 1, the method comprising reacting a biphenol represented by Formula 2, a phosphonic dichloride represented by Formula 3 and an end-capping agent in the presence of a Lewis acid catalyst:

• wherein in Formula 1:
• R is hydrogen, substituted or unsubstituted C1-C5 alkyl, substituted or unsubstituted C2-C5 alkenyl, substituted or unsubstituted C5-C6 cycloalkyl, substituted or unsubstituted C5-C6 cycloalkenyl group, substituted or unsubstituted C6-C20 aryl, or a substituted or unsubstituted C6-C20 aryloxy,
• R1 and R2 are the same or different and are each independently substituted or unsubstituted C1-C6 alkyl, substituted or unsubstituted C5-C6 cycloalkyl, substituted or unsubstituted C6-C12 aryl, or halogen,
• a and b are the same or different and are each independently an integer from about 0 to about 4, and
• n is an integer from about 4 to about 500,
• and wherein in Formula 2:
• R1, R2, a and b are as defined in Formula 1,
• and wherein in Formula 3:
• R is as defined in Formula 1.