The effect of RAFT-derived cationic block copolymer structure on gene silencing efficiency

Abstract The solubility parameters, δp, of a number of polymers have been determined by swelling in a series of solvents with various solubility parameter values, δ0. The δp values were obtained for (see PDF for diagram) During the course of this work it was concluded that solvent nature (polarity and association) play an important role in the swelling power of a solvent. These interactions create considerable ambiguity of the data in cases where dipole interaction or association takes place between polymer-solvent pairs or solvent-solvent pairs. For this reason a series of “select” solvents were chosen that did not display these interactions. Included in these “select” solvents were the aliphatic and aromatic hydrocarbons (δ0=6.0–9.2). In addition the aliphatic alcohols which are strongly hydrogen bonded were included to cover the upper range of δ0 values (δ0=10.8–14.2). This study has revealed that the swelling curves of siloxane copolymers yield only the individual δp values of the homopolymers. From these results it appears as though this type of measurement is not sensitive to copolymer structure, i.e., random or block copolymer structure.

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Parallel algorithm for numerical self-consistent field theory simulations of block copolymer structure

Polymer ◽

10.1016/s0032-3861(03)00606-2 ◽

2003 ◽

Vol 44 (19) ◽

pp. 5859-5866 ◽

Cited By ~ 74

Author(s):

Scott W. Sides ◽

Glenn H. Fredrickson

Keyword(s):

Field Theory ◽

Block Copolymer ◽

Parallel Algorithm ◽

Consistent Field ◽

Self Consistent ◽

Self Consistent Field ◽

Copolymer Structure ◽

Self Consistent Field Theory

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Synthesis and thermal properties of novel solid-solid phase change materials with comb-polyurethane block copolymer structure for thermal energy storage

Thermochimica Acta ◽

10.1016/j.tca.2017.02.012 ◽

2017 ◽

Vol 651 ◽

pp. 58-64 ◽

Cited By ~ 6

Author(s):

Xiaosheng Du ◽

Haibo Wang ◽

Zongliang Du ◽

Xu Cheng

Keyword(s):

Thermal Properties ◽

Energy Storage ◽

Block Copolymer ◽

Phase Change ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Phase Change Materials ◽

Solid Phase ◽

Copolymer Structure

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Influence of Grafted Block Copolymer Structure on Thermoresponsiveness of Superparamagnetic Core–Shell Nanoparticles

Biomacromolecules ◽

10.1021/acs.biomac.7b01403 ◽

2017 ◽

Vol 19 (5) ◽

pp. 1435-1444 ◽

Cited By ~ 8

Author(s):

Steffen Kurzhals ◽

Martina Schroffenegger ◽

Noga Gal ◽

Ronald Zirbs ◽

Erik Reimhult

Keyword(s):

Block Copolymer ◽

Core Shell ◽

Shell Nanoparticles ◽

Copolymer Structure ◽

Core Shell Nanoparticles

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Application of SAS to Bulk Amorphous Polymers, Block Copolymers and Polymer Blends

MRS Proceedings ◽

10.1557/proc-79-59 ◽

1986 ◽

Vol 79 ◽

Author(s):

R. J. Roe

Keyword(s):

Block Copolymer ◽

Block Copolymers ◽

Polymer Blends ◽

Approximation Theory ◽

Random Phase Approximation ◽

Random Phase ◽

Amorphous Polymers ◽

Phase Approximation ◽

Block Copolymer Micelles ◽

Copolymer Structure

AbstractThis article discusses the application of small-angle neutron and X-ray scattering techniques to the study of bulk amorphous polymers, block copolymers and polymer blends. The subject matter discussed include density fluctuation in single component amorphous polymers, concentration fluctuation in compatible polymer blends and its interpretation in terms of the random phase approximation theory, analysis of the scattering from incompatible polymer blends as developed by Porod, determination of the phase boundary thickness, order-disorder transition in block copolymer, interpretation of the scattering from disordered block copolymer systems by means of the random phase approximation theory, characterization of ordered block copolymer structure, and the study of block copolymer micelles.

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