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Injection-molded products usually show hierarchical structure from skin to core due to the existence of shear gradient and temperature gradient. Investigating the hierarchical structure is helpful to better understand the structure-property relationship of injection-molded sample, which is important for design and preparation of polymer products with high performance. In this work, the hierarchical...
The polymer matrix structure and the interface are strongly influenced by filler in semi-crystalline polymer composites because the fillers have the potential to nucleate the polymer crystallization. The structure of the nucleated crystalline polymer on filler is of particular interest and is a key to the interfacial enhancement. In this work, whiskers, with a large length/diameter ratio and with...
In contrast to most studies in the literature where soy protein was used as a particulate filler in hydrophobic thermoplastic polymers, in this study, soy protein concentrate (SPC) was processed as a plastic to blend with poly(butylene adipate-co-terephthalate) (PBAT). By adjusting water content in the formulated SPC from low to high prior to compounding, SPC exhibited behaviors ranging from rigid...
Natural polyelectrolyte micro-shells were constructed through layer-by-layer (LbL) assembling of alginate sodium (ALG) and chitosan (CHI) onto weakly cross-linked melamine formaldehyde (MF) colloidal particles and subsequent removal of core. The assembled materials presented good film formation ability. It was found that under moderate conditions (room temperature, pure water solution) the ALG/CHI...
The nucleating ability of halloysite nanotubes (HNTs) towards isotactic polypropylene (iPP) was investigated by differential scanning calorimetry (DSC), X-ray diffraction (XRD), polarized optical microscopy (POM) and scanning electron microscopy (SEM). HNTs are identified to have dual nucleating ability for α-iPP and β-iPP under appropriate kinetics conditions. The formation of β-iPP is dependent...
Due to both theoretical and practical importance, the formation mechanism of shear-induced shish–kebab and the precise microstructure and molecular composition in shish–kebab have been extensively investigated for many years. However, a systematic review on the manipulation of shish–kebab superstructure in the injection-molded specimens, taken account of combining theoretical understanding, preparation...
We present a facile method for the encapsulation of nanoparticles' (NPs) systems within the interior space of bio-polyelectrolyte microshells. The microshells, constructed by alternate adsorption of alginate sodium (ALG) and chitosan (CHI) onto the surface of colloidal templates and subsequent removal of cores, allow the polystyrene (PS) or SiO 2 nanoparticles (NPs) adsorbed into the internal...
Nano-sized hydroxyl aluminum oxalate (nano-HAO) and montmorillonite (MMT) were mixed into low density polyethylene (LDPE)/ethylene propylene diene rubber (EPDM) system via melt compounding method. By means of LOI and UL94 horizontal burning tests, MMT and nano-HAO together exhibited better performance on flame-retarding LDPE/EPDM composites than how they performed individually, which proved that there...
Well-defined amphiphilic block copolymers, poly(ethylene glycol) methyl ether-b-poly(styrene) (mPEG-b-PS), in which the PS blocks had different molecular weights, were synthesized by atom transfer radical polymerization (ATRP). Through introduction of selective solvents for the blocks, crystalline and amorphous blocks were self-assembled into different micelle structures in solutions. Atomic force...
We utilized alginate sodium (ALG) and chitosan (CHI) as wall components to construct a natural and biodegradable polyelectrolyte microshell by the electrostatic self-assembly technique. The resultant ALG–CHI shells were found to maintain intact spherical shape in different poly(styrenesulfonate sodium) (PSS) bulk concentrations (maximal detection concentration 20.0wt%). Compared with the shells composed...
The interaction force between transcription factor TINY and its corresponding cis-element has been studied with single molecule force microscopy. TINY belongs to the AP2/EREBP family, which is the second largest transcription factor family in plant and plays an important role in the genetic regulation of plant development and growth. The results showed that TINY bound to dehydration-responsive element...
A series of novel hybrid organic–inorganic light-emitting materials, polyhedral oligomeric silsesquioxane-tethered poly(fluorenyleneethynylene)s, were successfully synthesized via Sonagashira coupling reaction. The chemical structures of these copolymers were determined by 1 H NMR and FT-IR spectra. The morphologies of these copolymers were studied in details using TEM and WAXD. The WAXD data...
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