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A PDMS elastomer based on acylhydrazone groups with both acid- and heat-assisted self-healing properties was successfully prepared from tetra-acylhydrazine-terminated PDMS and terephthalaldehyde through solution casting. The good healing performance was obtained with catalytic acetic acid for 24 h at 25 °C or by annealing at 120 °C for 2 h. The elastomer exhibited a reversible transition near 80 °C...
In this paper, the reversible crystal-crystal transition of poly(hexamethylene dithiocarbonate) (PHMDC) has been systematically studied. According to various experimental results, we confirm that the transition shares the common features with Brill transition that is widely observed in nylons. This transition is clearly associated with the reversible trans-gauche conformational transformation of the...
The thermal imidization process of 1,2,4,5-benzenetetracaboxylic (PMDA)/4,4’-diamnodiphenyl ether (4,4′-ODA) solutions in N-methyl-2-pyrrolidone (NMP) from polyimide (PI) precursor, poly (amic acid) (PAA), was systematically investigated through a series of characterization methods, such as Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), differential scanning calorimetry...
A supramolecular polymer gel formed between triptycene-based bis(crown ether) and copolymer containing dibenzylammonium (DBA) moieties by host–guest interactions was described. We demonstrated the formation of the supramolecular polymer networks between the bis(crown ether) and the copolymer by the 1 H NMR spectroscopy and solution viscometry, and we also obtained a colorless and transparent...
Rheological properties of cellulose dissolved in two ionic liquids (ILs), 1-allyl-3-methylimidazolium chloride (AmimCl) and 1-butyl-3-methylimidazolium chloride (BmimCl), with co-solvent dimethylsulfoxide (DMSO), are studied in the concentration range of cellulose from 0.070 to 6.0 wt%. The viscosities of ILs are exponentially decreased by adding DMSO in the concentration range of 0–100 wt%. The co-solvent...
In this study, an organoclay, ALA–MMT, was prepared by the ionic exchange reaction of montmorillonite (MMT) with 12-aminododecanoic acid (ALA). ALA–MMT was then used as a filler to prepare a series of composite polymer electrolytes based on polyacrylonitrile (PAN) and LiClO 4 . The effect of the addition of ALA–MMT on the properties of the composite polymer electrolytes (CPEs) was investigated...
In this study, a reactive phosphorus-containing organoclay (RPC) was successfully prepared through the cationic exchange reaction of sodium montomorillonite clay with hexyltriphenylphosphonium bromide and surface modification by grafting it with glycidyloxypropyltrimethoxy silane. It is characterized using X-ray diffraction (XRD) and Fourier transform IR (FTIR) measurements. A series of novel epoxy/clay...
In this work, a stable de-aggregated solvent-swollen organic modified clay, ALA–MMT, suspension is prepared by an efficient solvent swelling process using a home-made shaking mixer. It is found that the estimated average size of the as-prepared organoclay particles in the suspension is reduced to about 155nm, which has not been reported before. The X-ray diffraction (XRD) patterns confirm that the...
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