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The free radical copolymerization of three N-phenylmaleimides bearing a chiral oxazoline residue at ortho-position of the phenyl group (OPMI) with methyl methacrylate (MMA) was carried out in tetrahydrofuran by varying the molar ratio of the comonomers. The monomer reactivity ratios and Alfrey–Price Q–e values were determined. The data revealed that the monomer OPMI has a distinct tendency to cross-propagate...
Another natural biopolymer, sodium alginate, has been electrospun from aqueous solution by blending with a non-toxic, biocompatible, synthetic polymer poly(ethylene oxide) (PEO). The interaction between sodium alginate and PEO has been evidenced by FTIR and conductivity change, which is thought to be the main reason for the successful electrospinning. The solution properties of sodium alginate/PEO...
In this study, the unsaturated polyester resin/graphite nanosheet conducting composites with a low percolation threshold of 0.64vol% have been prepared via in situ polymerization under the application of ultrasonic irradiation. Two theoretical approaches (mean-field theory and excluded volume theory) are applied to interpret this low critical volume fraction and the latter can explain the low value...
Three functionalized polypropylenes (PP), a maleated PP (PP-g-MA), primary amine functionalized PP (PP-g-NH 2 ), and secondary amine functionalized PP (PP-g-NHR), were melt blended with a thermoplastic polyurethane (TPU) at different compositions. Compatibility of each functionalized PP with TPU was compared by investigating the binary blends using rheological (mixer torques, dynamic shear...
The rheological properties of a thermoplastic polyurethane (TPU) were studied at small and large deformation via three different types of rheometry: dynamic shear, capillary, and torque (an instrumented batch mixer). The effect of degradation during TPU processing on the melt viscosity was investigated and several factors, such as temperature, time, shear stress, and flow type that may affect the...
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