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Amorphous biodegradable copolyesters have been synthesized using various alicyclic monomers, including 1,4-cyclohexanedimethanol (CHDM), 1,4-cyclohexanediol (CHDO), isosorbide (1,4:3,6-dianhidro-D-sorbitol) (IS), and 1,4-cyclohexane dicaboxylic acid (CHDA), to enhance the thermal properties of polyesters. We have studied the effect of alicyclic monomers on the thermal properties, especially, on the glass transition temperature (Tg) of the amorphous copolyesters. On incorporating alicyclic diol monomers into poly(ethylene succinate-co-terephthalate) (PEST), Tg of amorphous copolyesters was greatly increased. As the rigidity of alicyclic monomers increases, the effect becomes more significant. By comparing copolyesters synthesized with the same molar ratio of alicyclic monomers in the feed, we found that the molar ratio of IS in the copolyester product was much smaller than those of CHDM and CHDO. Nonetheless, IS induced the largest Tg enhancement in copolyesters even though a much smaller molar ratio of IS was incorporated in the product compared to CHDM and CHDO. To study the effects of alicyclic diacid monomers, copolyesters containing CHDA were synthesized. As in the case of alicyclic diols, CHDA was found to be very effective in enhancing the thermal properties. Among these copolyesters produced, PEI30ST synthesized with 30 mol% of succinic acid (SA) and 70 mol% of dimethyl terephthalate (DMT) as diacid and 30 mol% of IS as diol exhibited the highest Tg of 74.2 oC. And poly(ethylene-co-CHDM succinate-co-terephthalate) (PEC30ST70) and poly(ethylene-co-IS succinate-co-terephthalate) (PEI30ST70) exhibited high optical transmittance and were confirmed to be biodegradable, exhibiting about 50% and 40% biodegradability, respectively, after 50 days in a biodegradability test under compost conditions. Hence, these novel transparent biodegradable polyesters could be highly useful in flexible packaging applications requiring transparency.

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Exosome and Polymersome for Potential Theranostic Applications Taiyoun Rhim, Kuen Yong Lee pp.577-586

Adhesive Heparin Coating for Marine Antifouling Applications Suyeob Kim, Sangwon Ko, Sung Min Kang pp.645-649

Concentration Dependent Optical Properties of Rhodamine B Doped Poly(vinyl alcohol) Solutions Jitendra Tripathi, Anupam Sharma, Shilpa Tripathi, Kallol Kumar Das pp.617-622
A Dithienophosphole-Thienylenevinylene-Based Donor-Acceptor Copolymer for Organic Field-Effect Transistors Ji Eun Lee, Tae Kyu An, Yun-Hi Kim pp.629-633
Selective and Full Derivatization of Amino Group in Chitosan with Alkyl Chloroformate of Low Stereo-Hindrance Zi-Wei Feng, Shao-Hua Huang, Wei Chen, Zheng-Wu Bai pp.650-653
Mitochondria-Selective Photodynamic Tumor Therapy Using Globular PEG Nanoparticles Eun Bi Ku, Kyung Taek Oh, Yu Seok Youn, Eun Seong Lee pp.634-639

Effect of Alicyclic Monomers on Thermal Properties of Transparent Biodegradable Polyesters Ji Soo Ahn, Sang Mi Kang, Min Kyung Kim, Ye Jin Kim, Ki Cheol Yoon, O Ok Park pp.609-616

Synthesis of Polypyrrole Nano/Microspheres Using Cobalt(Ⅲ) as an Oxidizing Agent and Its Ammonia Sensing Behavior Zahoor Ahmad, Muhammad Aziz Choudhary, Aneela Mehmood, Riffat Wakeel, Tashfeen Akhtar, Muhammad Aftab Rafiq pp.596-601
pH and Redox Dual Stimuli-Responsive Injectable Hydrogels Based on Carboxymethyl Cellulose Derivatives Yueqin Shen, Xian Li, Yawen Huang, Guanjun Chang, Ke Cao, Junxiao Yang, Renyi Zhang, Xueying Sheng, Xu Ye pp.602-608
Preparation and Study on Thermal Conductive Composites of Chlorinated Polyethylene Rubber Reinforced by Boron Nitride Particles Junjie Shu, Ru Xia, Jiasheng Qian, Jibin Miao, Lifen Su, Ming Cao, Hongyun Lin, Peng Chen, Jinyang Chen pp.640-644
Optimization of Production, Biochemical Characterization and In Vitro Evaluation of the Therapeutic Potential of Fibrinolytic Enzymes from a New Bacillus Amyloliquefaciens Fabiana América Silva Dantas de Souza, Amanda Emmanuelle Sales, Pablo Eugênio Costa e Silva, Raquel Pedrosa Bezerra, Germana Michelle de Medeiros e Silva, Janete Magali de Araújo, Galba Maria de Campos Takaki, Tatiana Souza Porto, José António Couto Teixeira, Ana Lúcia Figueiredo Porto pp.587-595
Alendronate-Modified Hydroxyapatite Nanoparticles for Bone-Specific Dual Delivery of Drug and Bone Mineral Seok-Joon Hwang, Ji-Seon Lee, Tae-Kyung Ryu, Rae-Hyung Kang, Ki-Young Jeong, Dae-Ryong Jun, Jung-Min Koh, Sung-Eun Kim, Sung-Wook Choi pp.623-628

참고문헌 (22건) : 자료제공( 네이버학술정보 )

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번호 참고문헌 국회도서관 소장유무
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