| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 기능성 고분자 |
| 제목 | Functional inorganic-organic hybrid materials based on PMSSQ |
| 초록 | Silsesquioxanes with the chemical formula (RSiO1,5)x have recently emerged as a new class of molecules for the preparation of nano-structured materials with promising properties, such as low dielectric constants for application in microelectronics [1,2] or superior mechanical properties [3]. Within this work organic-inorganic block copolymers based on poly(methylsilsesquioxanes) (PMSSQs) will be described. Functionalized PMSSQ were developed to initiate a controlled radical polymerization by either ATRP or RAFT polymerization of various organic monomers. This synthetic concept led to different hybrid block copolymers. The functional moiety for ATRP or RAFT polymerization was incorporated by co-condensation of MTMS and a functional trichlorosilane, with a precise control of the initiator fraction incorporated in the PMSSQ. The polymerization was then carried out successfully with a range of different monomers, e.g. methacrylates, acrylates and others functionalized monomers like triphenylamines. The obtained block copolymers consisted of an inorganic block linked to the organic block, as shown in scheme 1. Block copolymer ratios could be varied over a broad composition range. a) b) Scheme 1: a) Schematical structure of inorganic-organic block copolymers. b) contact angle of PDMA-b-PMSSQ film. The synthesized block copolymers showed interesting properties in bulk and when coated on different substrates. For example, extremely hydrophobic contact angles (Θa ＞ 145°) could be measured on PMSSQ-b-poly(2-ethylhexyl-acrylate) and PMSSQ-b-poly(decylmethacrylate) (Figure 1) thin films. Noteworthy, thin films were prepared by spin-coating from 10wt% - 20wt% polymer solutions following a curing step at 200°C, resulting in rather smooth film surfaces. Detailed investigations will be presented. Additionally, hybrid block copolymers based on PMSSQ and poly(triphenylamines) were prepared. These materials are expected to be applied in OLEDs. First results on possibilities to achieve spin-coatable prepolymers for OLED application will be discussed. References: [1] R.D. Miller, Science, 1999, 286, 421; P. Singer, Semicond. Int., 1998, June, 90. [2] Hyun Wook Ro, Kook Ji Kim, Patrick Theato, David W. Gidley, and Do Y. Yoon, Macromolecules (2005), 38 (3), 1031-1034. [3] Brown, J.F.; Vogt,L.; Katchman,A.; Eustance, K.; Kiser, K.; Krantz, K. J Am Chem Soc 1960, 82, 6294. |
| 저자 | Carmen Teutsch1, Daniel Kessler2, Patrick Theato3 |
| 소속 | 1Institute of Organic Chemistry, 2Univ. of Mainz, 3Germany |
| 키워드 | |
