Sungkyunkwan University

Soo-Jung Kang

Jinhwan Kim

Sang-Won Park

Sangwon Park

Vo Thi Hai

Jae Min Jeong

The present disclosure relates to a copolyester including a polymer formed by polymerization of monomers represented by the following Structural Formula 1 to Structural Formula 4: 

Copolyester including cyclic aliphatic unit, method of preparing the same, and optical film with low water absorption and low birefringence including the same

The present disclosure relates to a phosphorus compound represented by the following Chemical Formula 1.  In the above Chemical Formula 1, Ar is aryl and R, R, R, R, R, and Rare each independently H, substitutable linear or branched C-Calkyl and substitutable C-Caryl, the aryl includes a member selected from the group consisting of phenyl, biphenyl, naphthalene, fluorene, anthracene, phenanthrene, pyrene, fluoranthen, chrysene, benzofluoranthen, perylene, quinoline, indenoanthracene, indenophenanthrene, hydroanthracene, dibenzothiophen, dibenzofuran, and combinations thereof, and the substitution is substitution with C-Calkyl or C-Caryl, but may not be limited thereto.

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Anyang-si, South Korea

Soo-Jung Kang