Ordering in self-organizing comb copolymer-like systems obtained by hydrogen bonding between charged or noncharged polymers and amphiphiles

Abstract

Ordering in self-organizing comb copolymer-like systems obtained by hydrogen bonding between charged or noncharged polymers and amphiphiles Ikkala, O.; Ruokolainen, J.; Torkkeli, M.; Tanner, J.; Serimaa, R.; Brinke, G. ten Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. AbstractMesomorphic structures and order-disorder transitions in comb copolymer-like systems obtained by hydrogen bonding of noncharged or charged homopolymers with amphiphiles are discussed. The amphiphiles consist of attractive and repulsive moieties and the emphasis will be on the situation without an additional solvent phase. Poly(4-vinyl pyridine), i.e. P4VP, hydrogen bonded to stoichiometric amounts of pentadecylphenol (PDP) is one of the characteristic examples. Small angle X-ray scattering and dynamic rheology demonstrate that this system forms a disordered melt at temperatures above the order-disorder temperature (T ODT ), whereas for TBT ODT a lamellar microphase separated structure is observed. Further cooling renders side chain crystallization. This phase behavior can be tailored by adjusting the attraction and the repulsion between the amphiphile and the polymer. Repulsion can be increased by making the alkyl chain longer or by adding charges to the backbone. Both lead in general to a higher T ODT . Order-disorder transitions can occur even in polyelectrolyte-amphiphile complexes as is demonstrated by first fully complexing P4VP with toluene sulphonic acid (TSA) to form a polymeric salt P4VP(TSA) 1.0 which is further hydrogen bonded to PDP. The presented results offer guidelines to apply the concepts to other polymers as well, with an example mentioned in relation to polyamide 6.

Long-range ordered columns of a hexabenzo[bc,ef,hi,kl,no,qr]coronene–polysiloxane complex: towards molecular nanowires

“…ten Brinke et al reported on lamellar structures of comb copolymer-like systems obtained by hydrogen bonding between polymers containing basic moieties and amphiphiles. 12 Their complexes are similar to c with respect to their molecular interactions. Recently, we have shown that the b units form columnar polymer complexes, which contain about 9% (w/w) of a hydrophobically modi®ed polyethyleneimine.…”

Relationship between Reaction Kinetics and Chain Dynamics of Vitrimers Based on Dioxaborolane Metathesis

“…In comparison, a physical network is formed from physical interactions, such as hydrogen bonding, − ionic, − metal–ligand, − or host–guest − interactions and so on. Physical interactions usually have interaction energies either one order higher than or of the same order of the thermal energy. , Therefore, the lifetime of these interactions would approach the observable time scales at certain temperatures to enable reversibility of the materials.…”

Frustrated crystallisation and hierarchical self-assembly behaviour of comb-like polymers

“…58,61 Their works demonstrated that the comb-like copolymer structures, using physical non-covalent interactions, opens possibilities to prepare tailored microstructures based on the expertise obtained in block copolymers and colloidal systems. 62 Takahashi et al prepared comb-like complexes composed of polyethyleneimine (PEI) and aliphatic carboxylic acids, such as stearic acid (SA) or oleic acid (OA), in which the corresponding comb complexes were obtained depending upon the ionic bond interaction between the carboxylic acid molecules and the imine groups of the PEI backbone. 63 Thereafter, some interesting comb-like complexes based on polyamine (PEI and polyallylamine (PAA)), [64][65][66][67][68][69][70][71] poly(propylene carbonate) (PPC) [72][73][74] and carboxylic acid, fluorinated acids 75 or dodecylbenzenesulfonic acid 76 were systematically fabricated.…”