Hybrid Copolymerization of Ethylene Oxide and tert-Butyl Methacrylate with Organocatalyst

Hybrid copolymerization of structurally different, reactivity and mechanism distinct monomers (e.g., cyclic and vinyl type monomers) is of great interest and challenge for both academic research and practical application. Herein, ethylene oxide-co-tert-butyl methacrylate-co-poly(ethylene glycol) benzyl methacrylate (EO-co-BMA-co-bPEO), a statistical copolymer was synthesized via hybrid copolymerization of EO and BMA using an uncharged, non-nucleophilic organobase t-BuP4 as the catalyst. Detailed characterizations indicate that hybrid copolymerization of ethylene oxide and vinyl monomer forms a statistical copolymer concurrently with the transesterification of tert-butyl group and oligomer PEO anions. The application of the copolymer as all solid lithium-ion battery polymer electrolyte was investigated by detecting the ionic conductivity (σ) with electrical impedance spectrum measurement.

Enhancing P3HT/PCBM blend stability by thermal crosslinking using poly(3-hexylthiophene)-S,S-dioxide

A statistical copolymer containing thiophene and thiophene-S,S-dioxide rings was utilized as a thermal crosslinker in a blend of P3HT and PCBM, demonstrating an effective strategy for preventing agglomeration of PCBM and enhancing blend stability.

Exploiting block copolymer phase segregation to tune vitrimer properties

<p> p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 17.1px; font: 16.0px Times; color: #000000; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} </p><p>In this paper, phase-segregating acrylic block copolymers are used to construct vitrimers. The resulting phase-segregated vitrimers display markedly different thermal and mechanical properties relative to those of homogeneous statistical copolymer-derived vitrimers. Importantly, the volume fraction of the functional block (i.e., the nominal cross-link density) can be used to modulate the stress relaxation profile of block vitrimers, while statistical copolymer-derived vitrimers display no change in relaxation behavior as a function of cross-link density. This study demonstrates that block copolymers offer additional design space to tune vitrimer properties, independent of polymer and cross-link identity and dynamic exchange chemistry.</p><p></p>

Mechanical and Structural Consequences of Associative Dynamic Cross-Linking in Acrylic Diblock Copolymers

<p>Block copolymers are used to construct covalent adaptable networks that employ associative exchange chemistry (vitrimers). The resulting vitrimers display markedly different nanostructural, thermal and rheological properties relative to those of their statistical copolymer-derived counterparts. This study demonstrates that prepolymer sequence is a versatile strategy to modify the properties of vitrimers.</p>

Mechanical and Structural Consequences of Associative Dynamic Cross-Linking in Acrylic Diblock Copolymers

<p>Block copolymers are used to construct covalent adaptable networks that employ associative exchange chemistry (vitrimers). The resulting vitrimers display markedly different nanostructural, thermal and rheological properties relative to those of their statistical copolymer-derived counterparts. This study demonstrates that prepolymer sequence is a versatile strategy to modify the properties of vitrimers.</p>

High-conductivity electrolyte gate dielectrics based on poly(styrene-co-methyl methacrylate)/ionic liquid

Self-assembly of a statistical copolymer in an ionic liquid renders mechanical integrity and ionic conductivity suitable for electrolyte-gated transistors.

Investigating the Tensile Behaviour of Blends of Polypropylene and a Statistical Copolymer of Propylene and Ethylene

The effect of a statistical copolymer of propylene and ethylene on the tensile strength of polypropylene was investigated.