The crystal growth of isotactic polystyrene (it-PS) is investigated in very thin, 11 nm thick films. The it-PS crystals grown in the thin films show quite different morphology from that in the bulk. With decreasing crystallization temperature, the branching morphology in a diffusion field appears: dendrite and compact seaweed. The branching morphology is formed through a morphological instabili...

A new bis(indenyl)zirconocene bearing a pendant Si-Cl anchor has been grafted onto MCM-41, SBA-15, MCM-48 and a disordered mesoporous silica for the polymerisation of ethylene and propylene, producing polymers with very high molecular weights, low polydispersities and, in the case of polypropylene, higher levels of isotacticity than obtainable with analogous homogeneous systems.

Front Cover: In article number 2300014, Yoshitake Suganuma and James A. Elliott investigate the effect of crosslink density on mechanical properties isotactic polypropylene (iPP) by dissipative particle dynamics (DPD) method. Coarse-grained structures iPP (blue chains) with different numbers crosslinks (magenta spheres) are developed from an all-atom model Bayesian optimization, their tensile t...

Two zwitterionic calcium complexes L1CaN(SiMe3)2(THF) (1) and L2CaN(SiMe3)2 (2) via protolysis reaction were synthesized. At ?75 °C, 1 gave a heterotactic sequence enriched polylactide, whilst 2 produced an isotactic polymer.

Abstract With the rapid development of society, severe haze weather caused by particulate matters (PMs) occurs frequently. Electret air filters have been playing an important role in purifying and alleviating pollution. In this work, electret were fabricated based on polypropylene (PP) materials to investigate their filtering performance PMs. First, PP-based films was mainly focused on. The cha...

New bis(N,N-trimethylsilylarylamidinate) zirconium dichloride complexes with various carbon substituents were prepared, and their solid as well as solution state structures were studied. In the polymerization of propylene, after activation by MAO, these catalysts provided two fractions. Ether soluble polymers were obtained at a low activity as sticky polymers with lower molecular weights, excep...

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