(A) study on the morphology of the polystyrene-poly(ethylene oxide) diblock copolymer and polystyrene homopolymer blends at the air/water interface = 물/공기 계면에서 폴리스타이렌-폴리에틸렌 옥사이드 블록공중합체와 폴리스타이렌 호모폴리머 혼합물의 모폴로지 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 188
  • Download : 0
We present the morphology of the polystyrene-poly(ethylene oxide) diblock copolymer (PS-b-PEO) and polystyrene homopolymer (PS homo) blends at the air/water interface. Based on the morphology, we construct a phase diagram using two variables, sum of PS mass in PS-b-PEO and mass of PS homo over total polymer mass, $\phi$, and the ratio of molecular weight (Mn) of PS homo to Mn of PS in PS-b-PEO, $\alpha$. In general, we find out both the increase of domain size and morphology transition from circular to cylindrical to planar morphology as $\phi$ increases, and only the similar morphology transition is seen as α goes up. Although this is observed in a typical morphology of PS-b-PEO as the relative PS block ratio and spreading concentration increase, our blends have two different features: 1) we can adjust the morphology easily by controlling the amount and Mn of PS homo; 2) New morphology that we call melt morphology is discovered for small α as PS homo act like plasticizer. In addition, we discuss the suppression of cylindrical morphology of the blends when the absolute size of PS block in PS-b-PEO does not exceed entanglement molecular weight of PS.
Advisors
Choi, Siyoungresearcher최시영researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2018.2,[iii, 30 p. :]

Keywords

Self-assembly▼aBlock copolymer▼aThin film▼aPolymer Blending▼aAir/water interface; 자가조립▼a블록공중합체▼a박막▼a고분자 혼합▼a물/공기 계면

URI
http://hdl.handle.net/10203/266397
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=733877&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0