Lei, Zhouyue; Wu, Peiyi
A highly transparent and ultra-stretchable conductor with stable conductivity during large deformation
Intrinsically stretchable conductors have undergone rapid development in the past few years and a variety of strategies have been established to improve their electro-mechanical properties. However, ranging from electronically to ionically conductive materials, they are usually vulnerable either to large deformation or at high/low temperatures, mainly due to the fact…
Ordered structure effects on β-nucleated isotactic polypropylene/graphene oxide composites with different thermal histories
Yu, Yansong; Xu, Ruizhang; Chen, Jinyao; Kang, Jian; Xiang, Ming; Li, Yuanjie; Li, Lu; Sheng, Xingyue
In this paper, the influence of ordered structure effects (OSE) on crystallization behaviors of b-nucleated isotactic polypropylene/graphene oxide (b-iPP/GO) composites with different thermal histories, which crystallized at a slow cooling rate (called SLOW), fast cooling rate (called FAST) and medium cooling rate (called MED), respectively, was studied by differential scanning…
Thin Biobased Transparent UV-Blocking Coating Enabled by Nanoparticle Self-Assembly
Olson, Emily; Li, Yifan; Lin, Fang-Yi; Miller, Ana; Liu, Fei; Tsyrenova, Ayuna; Palm, Devin; Curtzwiler, Greg W.; Vorst, Keith L.; Cochran, Eric; Jiang, Shan
A waterborne, UV-blocking, and visually transparent nanocomposite coating was formulated with ZnO nanoparticles and 2-hydroxyethyl cellulose (HEC). The coating is highly effective (
Dielectric and flash DSC investigations on an epoxy based nanocomposite system with MgAl layered double hydroxide as nanofiller
Szymoniak, Paulina; Li, Zhi; Wang, De-Yi; Schönhals, Andreas
Nanocomposites based on MgAL layered double hydroxides (LDH) and an epoxy resin were prepared and investigated by a combination of complementary methods. As epoxy resin Bisphenol A diglycidyl ether (DGEBA) was used with Diethylenetriamine as curing agent. The LDH was modified with taurine, which acts as an additional crosslinking agent…
How rheological behaviors of concentrated starch affect graft copolymerization of acrylamide and resultant hydrogel
Bao, Xianyang; Yu, Long; Shen, Shirley; Simon, George P.; Liu, Hongsheng; Chen, Ling
Corn starches with different amylose/amylopectin ratios were used to explore the effect of rheological behaviors of concentrated system on the graft copolymerization of acrylamide and resultant hydrogels, which sheds a light on their reactive extrusion process. The viscoelastic moduli of starch melts increased with increasing amylose content (AC), leading to…
Thermoreversible crystallization-driven aggregation of diblock copolymer nanoparticles in mineral oil
Derry, Matthew J.; Mykhaylyk, Oleksandr O.; Ryan, Anthony J.; Armes, Steven P.
A poly(behenyl methacrylate)37 (PBeMA37) macromolecular chain transfer agent is utilized for the reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of benzyl methacrylate (BzMA) directly in mineral oil at 90 °C. Polymerization-induced self-assembly (PISA) occurs under these conditions, yielding a series of sterically-stabilized PBeMA37-PBzMA …
Unique Isodimorphism of Poly(decamethylene succinate-ran-decamethylene fumarate): Large Pseudoeutectic Region and Fantastic Crystallization/Melting Behavior
Ye, Hai-Mu; Wang, Jing; Wang, Cai-Shui; Li, Hong-Fang
Poly(decamethylene succinate-ran-decamethylene fumarate)s (PDSFs) were synthesized, and their structure and crystallization behavior were systematically studied. All polyesters possess high crystallizability irrespective of composition and display the widest pseudoeutectic region that has been reported to date. Nevertheless, both melting point– and crystallization temperature–composition…
High Performance Thermoplastic Elastomers with Biomass Lignin as Plastic Phase
Huang, Jinhao; Liu, Weifeng; Qiu, Xueqing
For the first time, the coordination-based energy sacrificial bonds have been constructed in the interface between lignin and polyolefin elastomer for preparing a new class of high performance thermoplastic elastomers (TPEs) with biomass lignin as the hard plastic phase. The coordination bonds not only promoted the dispersion of lignin, but…
Anomalies in the low frequency vibrational density of states for a polymer with intrinsic microporosity – the Boson peak of PIM-1
Zorn, Reiner; Yin, Huajie; Lohstroh, Wiebke; Harrison, Wayne; Budd, Peter M.; Pauw, Brian R.; Böhning, Martin; Schönhals, Andreas
Polymers with intrinsic microporosity are promising candidates for the active separation layer in gas separation membranes. Here, the vibrational density of states (VDOS) for PIM-1, the prototypical polymer with intrinsic microporosity, is investigated by means of inelastic neutron scattering. The results are compared to data measured for a more conventional…