Incorporation of PPE in Lamellar Self-Assembled PS-b-P4VP(PDP) Supramolecules and PS-b-P4VP Diblock Copolymers

Abstract

Self-assembled blends of PS-b-P4VP(PDP) supramolecules, obtained by hydrogen bonding of pentadecylphenol (PDP) side chains to poly(4-vinylpyridine), and poly(2,6-dimethyl-1,4-diphenyl oxide) (PPE) were investigated by thermal analysis and small-angle X-ray scattering (SAXS) and compared with blends of PS-b-P4VP and PPE. Differential scanning calorimetry (DSC) measurements showed a single composition dependent T g of the PPE/PS layers for both systems, demonstrating that PPE is distributed throughout the PS layers. Furthermore, DSC showed that for the PPE/PS-b-P4VP(PDP) blends the presence of PDP is not restricted to the P4VP layers. Its partial presence in the PS-containing domains was confirmed by nuclear magnetic resonance (NMR) spectroscopy on PS-P4VP core-corona nanorods prepared from hexagonally self-assembled PS-b-P4VP-(PDP) supramolecules. The results of the SAXS study on the dependence of the lamellar period of PPE/PS-b-P4VP blends on the amount of PPE were in excellent agreement with a theoretical model based on the Alexander-De Gennes approximation assuming a uniform distribution of PPE throughout the PS layers. For PPE/PS-b-P4VP(PDP) blends the dependence of the long period on the amount of PPE turned out to be somewhat stronger, which may be related to the supramolecular comb-shaped nature of the P4VP(PDP) blocks.

Supramolecular Micellization of Diblock Copolymer Mixtures Mediated by Hydrogen Bonding for the Observation of Separated Coil and Chain Aggregation in Common Solvents

“…[1][2][3][4] It has been demonstrated that poly(4-vinyl pyridine) (P4VP) is able to interact strongly with polymers of a wide variety of structures through hydrogen bonding, such as poly(vinyl phenol) (PVPh), [5][6][7][8] poly(vinyl alcohol), [9] and phenolic resin. [10] It is well known that the nature of the solvent medium can control complex formation.…”

Hollow Inorganic Nanospheres and Nanotubes with Tunable Wall Thicknesses by Atomic Layer Deposition on Self‐Assembled Polymeric Templates

“…[28][29][30][31][32] In particular, hydrogen-bonded polymer-surfactant complexes of polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) and alkyl phenols, such as pentadecyl phenol (PDP) and dodecyl phenol (DDP), lead to discrete PS-b-P4VP nanorods with a PS core and P4VP corona. [27,33,34] The advantages of such a supramolecular approach include: i) reduction of the glass-transition temperature (T g ) of both phases (T g (PS) ≈ 67°C; T g (P4VP/PDP) ≈ room temperature) [35] to allow shear alignment at moderate temperatures for improvement of the self-assembled structures; and ii) preparation of PS-core-P4VP-corona nano-objects by simple dissolution of PDP. Electroless deposition using Pd and adsorption of CdSe nanoparticles allows granular inorganic coatings on the PS-b-P4VP rods.…”

Nanophase-Separated Structures of Hydrogen-Bonded Interpolymer Complexes of AB Block Copolymer/C Homopolymer in Thin Film with Variable Blending Composition upon Solvent Annealing

“…[1][2][3][4][5][6][7] Initially, most of the studies involved the blends of a block copolymer with a homopolymer identical to one of the blocks, i.e. A-b-B/A or A-b-B/B.…”