S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Theses (Master's Degree_화학생물공학부)
Post-Modification of Reactive PPFPA Thin Films Using Primary Alkyl Amines
- 공과대학 화학생물공학부
- Issue Date
- 서울대학교 대학원
- Reactive Polymer; RAFT Polymerization; Post-Modification; Quartz Crystal Microbalance with Dissipation; Penetration Depth; Neutron Reflectivity
- 학위논문 (석사)-- 서울대학교 대학원 : 화학생물공학부, 2014. 2. 차국헌.
- In this paper, we investigate the controlled post-modification of spin-cast reactive polymer thin films, based on pentafluorophenyl acrylate polymers, with two controlling parameters such as molecular weight of the bare polymer and the size of amines. Active ester polymers have begun to demonstrate its potentials due to its rapid and quantitative reactivity with primary or secondary amines. Diverse chemical properties of amine-containing molecules could be transferred into the poly(PFPA) platforms easily.
The spin-cast thin films of high and low molecular weight of poly(PFPA), synthesized by the reversible addition-fragmentation chain transfer (RAFT) polymerization, showed the distinctive difference originating from the primary alkyl amines of different alkyl chain length. We monitored the amine-exchange kinetics and the penetration depth into poly(PFPA) thin films using quartz crystal microbalance with dissipation (QCM-D), combined with the surface morphological changes using AFM and OM. For further investigation of the internal structure of post-treated films, neutron reflectivity measurements were conducted.
In conclusion, both alkyl chain length of primary alkyl amines and the molecular weight of poly(PFPA) affect the penetration depth and dissolution of the polymer chains from the surface of thin films, respectively. The reactive poly(PFPA) thin films based on the simple and quantitative post-modification with amine-containing molecules could be utilized for many practical applications due to the ease of control over the degree of functionalization and film properties.