Hierarchical Structures in Thin Films of Miktoarm Star Polymers: Poly(n-hexyl isocyanate)(12K)–Poly(ε-caprolactone)1–3(5K)
作者： Young Yong Kim , Sungmin Jung , Changsub Kim , Brian J. Ree , Daisuke Kawato
DOI: 10.1021/MA501695B
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摘要: A series of miktoarm star polymers, [poly(n-hexyl isocyanate)(12K)]–[poly(e-caprolactone)1–3(5K)] (PHIC–PCL1–3) (composed a rigid self-assembling PHIC arm and one to three flexible crystallizable PCL arms), were investigated examine the polymers’ thermal properties nanoscale thin film morphologies. The polymers stable up 180 °C. components underwent phase separation during solution casting, drying, post toluene-annealing processes, forming interesting but very complex resulting morphologies examined in detail for first time using synchrotron grazing incidence X-ray scattering (GIXS) measurements quantitative data analysis. All polymer films formed vertically well-oriented lamellar structures, regardless number length arms. These structures quite different from cylindrical commonly observed conventional diblock copolymer havi...
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