Cho Wonseok, Im Soeun, Kim Seyul, Kim Soyeon, Kim Jung Hyun
Department of Chemical and Biomolecular Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemoon-Gu, Seoul 120-749, Korea.
Polymers (Basel). 2016 May 12;8(5):189. doi: 10.3390/polym8050189.
Hydrophobic and comparatively thermally-stable poly(3,4-ethylenedioxythiophene), , poly(styrene sulfonate--vinyltrimethoxysilane) (PEDOT:P(SS--VTMS)) copolymer was successfully synthesized via the introduction of silane coupling agent into the PSS main chain to form P(SS--VTMS) copolymers. PSS and P(SS--VMTS) copolymers were successfully synthesized via radical solution polymerization, and PEDOT:P(SS--VTMS) was synthesized via Fe⁺-catalyzed oxidative polymerization. The characterization of PEDOT:P(SS--VTMS) was performed through an analysis of Fourier transform infrared spectroscopy (FTIR) results, water contact angle and optical images. The electrical properties of conductive PEDOT:P(SS--VTMS) thin films were evaluated by studying the influence of the VTMS content on the electrical and physical properties. The conductivity of PEDOT:P(SS--VTMS) decreased with an increase in the VTMS content, but was close to that of the PEDOT:PSS, 235.9 S·cm. The introduction of VTMS into the PSS copolymer improved the mechanical properties and thermal stability and increased the hydrophobicity. The thermal stability test at a temperature over 240 °C indicated that the sheet resistance of PEDOT:PSS increased by 3,012%. The sheet resistance of PEDOT:P(SS--VTMS), on the other hand, only increased by 480%. The stability of PEDOT:P(SS--VTMS) was six-times higher than that of the reference PEDOT:PSS.
通过将硅烷偶联剂引入聚苯乙烯磺酸盐（PSS）主链以形成聚（苯乙烯磺酸盐 - 乙烯基三甲氧基硅烷）（P（SS - VTMS））共聚物，成功合成了疏水性且相对热稳定的聚（3,4 - 乙撑二氧噻吩），即聚（3,4 - 乙撑二氧噻吩）：聚（苯乙烯磺酸盐 - 乙烯基三甲氧基硅烷）（PEDOT：P（SS - VTMS））共聚物。通过自由基溶液聚合成功合成了PSS和P（SS - VMTS）共聚物，并通过Fe⁺催化的氧化聚合合成了PEDOT：P（SS - VTMS）。通过对傅里叶变换红外光谱（FTIR）结果、水接触角和光学图像的分析对PEDOT：P（SS - VTMS）进行了表征。通过研究VTMS含量对导电PEDOT：P（SS - VTMS）薄膜的电学和物理性能的影响来评估其电学性能。PEDOT：P（SS - VTMS）的电导率随VTMS含量的增加而降低，但接近PEDOT：PSS的电导率，即235.9 S·cm⁻¹。将VTMS引入PSS共聚物中改善了机械性能和热稳定性，并增加了疏水性。在超过240°C的温度下进行的热稳定性测试表明，PEDOT：PSS的薄层电阻增加了3012%。另一方面，PEDOT：P（SS - VTMS）的薄层电阻仅增加了480%。PEDOT：P（SS - VTMS）的稳定性比参比PEDOT：PSS高六倍。
