Self-Assembly Structures through Competitive Interactions of Crystalline−Amorphous Diblock Copolymer/Homopolymer Blends: Poly(ε-caprolactone-b-4-vinyl pyridine)/Poly(vinyl phenol)

The steric hindrance effect on the hydrogen bonding strength and self-assembly supramolecular structures of the PS-b-PVPh diblock copolymer when blended with P4VP and P2VP homopolymers was investigated.

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Nanostructured Thermoset Blends Induced by Self-assembly of Polyisoprene-bpoly(4vinyl pyridine) Diblock Copolymer Blended with Thermoset Epoxy

10.31219/osf.io/sx8ty ◽

2020 ◽

Author(s):

Liqian Ke

Keyword(s):

Bisphenol A ◽

Diblock Copolymer ◽

Self Assembly ◽

Average Diameter ◽

Ozone Treatment ◽

Interfacial Effects ◽

Multi Scale ◽

Epoxy Monomer ◽

Vinyl Pyridine ◽

Thermoset Epoxy

Nanostructured thermoset blends were prepared based on a bisphenol A-type epoxyresin and an amphiphilic reactive diblock copolymer, namely polyisopreneblockpoly(4-vinyl pyridine) (PI-P4VP). Infrared spectra revealed that the P4VP blockof the diblock copolymer reacted with the epoxy monomer. However, the non-reactivehydrophobic PI block of the diblock copolymer formed a separate microphase on thenanoscale. Ozone treatment was used to create nanoporosity in nanostructuredepoxy/PI-P4VP blends via selective removal of the PI microphase and lead tonanoporous epoxy thermosets; disordered nanopores with the average diameter of about60 nm were uniformly distributed in the blend with 50 wt% PI-P4VP. Multi-scale phaseseparation with a distinctly different morphology was observed at the air/sampleinterface due to the interfacial effects, whereas only uniform microphase separatedmorphology at the nanoscale was found in the bulk of the blend.

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Barriers to defect melting in chemo-epitaxial directed self-assembly of lamellar-forming diblock copolymer/homopolymer blends

10.1117/12.2085685 ◽

2015 ◽

Author(s):

Kenichi Izumi ◽

Bongkeun Kim ◽

Nabil Laachi ◽

Kris T. Delaney ◽

Michael Carilli ◽

...

Keyword(s):

Diblock Copolymer ◽

Self Assembly ◽

Homopolymer Blends

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Surface quantitative characterization of poly(styrene-co-4-vinyl phenol)/poly(styrene-co-4-vinyl pyridine) blends with controlled hydrogen bonding interactions

Polymer ◽

10.1016/j.polymer.2004.04.053 ◽

2004 ◽

Vol 45 (14) ◽

pp. 4945-4951 ◽

Cited By ~ 13

Author(s):

Shiyong Liu ◽

Chi- Ming Chan ◽

Lu-Tao Weng ◽

Ming Jiang

Keyword(s):

Hydrogen Bonding ◽

Quantitative Characterization ◽

Hydrogen Bonding Interactions ◽

Vinyl Pyridine ◽

Vinyl Phenol

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Synthesis of poly(methyl methacrylate)-b-poly(acrylic acid) by DPE method

e-Polymers ◽

10.1515/epoly.2008.8.1.1051 ◽

2008 ◽

Vol 8 (1) ◽

Cited By ~ 2

Author(s):

Dong Chen ◽

Ruixue Liu ◽

Zhifeng Fu ◽

Yan Shi

Keyword(s):

Molecular Weight ◽

Acrylic Acid ◽

Methyl Methacrylate ◽

Diblock Copolymer ◽

Self Assembly ◽

Gel Permeation Chromatography ◽

Amphiphilic Diblock Copolymer ◽

Poly Methyl Methacrylate ◽

Copolymer Poly ◽

Poly Acrylic Acid

AbstractAmphiphilic diblock copolymer poly(methyl methacrylate)-b-poly(acrylic acid) (PMMA-b-PAA) was prepared by 1,1-diphenylethene (DPE) method. Firstly, free radical polymerization of methyl methacrylate was carried out with AIBN as initiator in the presence of DPE, giving a DPE-containing PMMA precursor with controlled molecular weight. tert-Butyl acrylate (tBA) was then polymerized in the presence of the PMMA precursor, and PMMA-b-PtBA diblock copolymer with controlled molecular weight was prepared. Finally, amphiphilic diblock copolymer PMMA-b-PAA was obtained by hydrolysis of PMMA-b-PtBA. The formation of PMMA-b-PAA was confirmed by 1H NMR spectrum and gel permeation chromatography. Transmission electron microscopy and dynamic light scattering were used to detect the self-assembly behavior of the amphiphilic diblock polymers in methanol.

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