In this work, swelling-induced structural evolution of the two sub-networks mutually affected each other through regulating the pH of the swelling solvent, even when the inter-component hydrogen bonds were absent, proving the presence of topological interlocking.

This feature article summarizes some latest work of covalent organic framework membranes, including their fabrication methods and applications to water treatment, organic solvent nanofiltration and gas separation.

The P-ylide-2/AlMe(BHT)2 Lewis pair (LP) system initiates the highly efficient, chemoselective, living/controlled block copolymerization of allyl methacrylate (AMA) and methyl methacrylate (MMA) into the PAMA-b-PMMA-b-PAMA and the polymer is PhCH₂SH-post-functionalized.

Here, we reported that 1,4-dioxan-2-one with different substituents was successfully synthesized by coupling glycolide with epoxide using Salen-Cr(Ⅲ)/PPNCl as catalyst. The monomers underwent ROP to form poly(ester-alt-ether)s with alternating glycolic acid and epoxides using thiourea/base. The poly(ester-alt-ether)s showed low T_g and chemical recyclability to monomers in the presence of catalysts.

A series block copolymers with controlled both UCST and LCST-type segments were synthesized and the effects on the phase transition behaviors were investigated in detail including not only concentration, pH but also the composition and sequence by incorporation of PAA or PBN segments in different manners.

The combined effect of an electron withdrawing fluoride and a sterically bulk benzhydryl group at the ortho-sites of one N-aryl group in the title iron precatalyst, allows for very high polymerization activity at an operating temperature of 80 oC.

A series of strategically designed neutral nickel catalysts with phosphine/benzocyclone-based ligand skeleton displayed high activity and thermal stability in ethylene polymerization to afford linear polyethylene. These bulky nickel catalysts also exhibited excellent tolerance towards acrylate functional groups and high incorporating capability, producing random copolymers with high molecular weights.

The remarkably enhanced melt memory effect of M-PP containing talc was ascribed to the stabilization of oriented nuclei facilitated by talc.

A new type of isotactic cis-1,4-polyocimene is synthesized by coordination polymerization of renewable β-ocimene using complex 3, which is readily transformed into epoxidized and hydroxylated products. The excellent isotactic trans-1,2-polyocimene is produced by complex 5c. Cis-1,4-PIP-b-cis-1,4-POc and cis-1,4-PBD-b-cis-1,4-POc is obtained in one-pot reactions of β-ocimene with isoprene and butadiene.

The different structures of double-layers, containing amorphous PDLA and highly oriented PLLA ultrathin films, with and without prior annealing at 150 C after melting at 190 C and then recrystallizing isothermally at 90 C have clearly illustrated the great impact of pre-annealing on the subsequent melt recrystallization behavior of them.

The attenuated total reflection Fourier transform infrared spectroscopy analyses was employed to investigate the diffusion behavior of CH₂Cl₂ in PAEK films with different crystallinities. According to the Fickian diffusion model, the diffusion coefficients of CH₂Cl₂ in PAEK films were calculated.

The hydrolysis resistance of polyimide fibers can be improved by crosslinking of the macromolecular chains. Crosslinked polyimide fibers were produced by intrinsic carboxyl decarboxylation. The oriented macromolecules and chemically crosslinked structure improved the tightness of the molecular chains and endowed the CPI fibers with excellent hydrolytic resistance.

The creep failure lifetime of PP is increased by 21.5 times by adding 2.0 wt.% TrGO due to the homogeneously dispersed TrGO-formed particle network. By combining the time-strain superposition method, generalized creep compliance curves were established, facilitating the prediction of creep failure lifetimes.

This paper presents a computational method for calculating the structure factors of complex polymers using three-dimensional Monte Carlo simulations and neural network techniques. The effectiveness of the algorithm is demonstrated by using a semiflexible ring diblock copolymer as an example in the study.