Poly blend films

Chitin films can be manufactured from DMAc solutions or by other approaches, for example, blend films of beta-chitin (derived from squid pens) and poly(vinyl alcohol) (PVA) were prepared by a solution casting technique from corresponding solutions of beta-chitin and PVA in concentrated formic acid. Upon evaporation of the solvent, the film having 50/50 composition was found to be cloudy [224]. 

Agari, Y, Shimada, M., Ueda, A. and Nagai, S. (1996) Preparation, characterization and properties of gradient polymer blends discussion of poly(vinyl chloride)/poly (methyl methacrylate) blend films containing a wide compositional gradient phase. Macromol. Chem. Phys., 197, 2017-2033. 

H Nishino, G Yu, AJ Heeger, T-A Chen, and RD Rieke, Electroluminescence from blend films of poly(3-hexylthiophene) and poly(Y-vinylcarbzaolc), Synth. Met., 68 243-247, 1995. 

Peesan M, Rujiravanit R, Supaphol P (2003) Characterisation of beta-chitin/poly(vinyl alcohol) blend films. Polym Test 22 381-387... 

Sua J-E, Yuanb XY et al (2010) Properties stability and biodegradation behaviors of soy protein isolate/poly(vinyl alcohol) blend films. Polym Degrad Stab 95 1226-1237... 

The inclusion of 5 wt% PCBM [l-(3-methoxycarbonyl)propyl-l-phe-nyl-[6,6]C6i] in the spin-coating solutions resulted in efficient polymer emission quenching for all the polythiophenes studied. The transient absorption spectra of the amorphous poly(541)/PCBM blend film. At 10 ps exhibited an absorption peak around 700 nm, similar to that observed for the poly(541) pristine film. The shape of the transient spectrum varied with time, with the absorption peak shifting from 700 nm at 10 is to 900 nm for time delays >100 (is, demonstrating the formation of two distinct transient species in the blend film. The monoexponential lifetime was t = 8 (is under Ar atmosphere and significantly shortened under 02 atmosphere. Monoexponential phase is therefore assigned to the decay of poly(541) triplet excitons. 

For the polymers poly(541) and poly(539), the observation of polymer triplet formation in the blend films indicates that their triplet energies are below that of PCBM (Er k 1.5 eV), while for poly(540), the observation of PCBM triplet rather than polymer triplet formation in the blend indicates that the poly(540) triplet state lies higher in energy than the PCBM triplet state. 

Blend films of poly(L-lactide) (PLLA) and poly(vinyl alcohol) (PVA) were synthesized. The component interaction, crystallization behavior, and miscibility of these blends were studied by solid-state NMR. ... 

Unexpectedly, when films were cast from these poly (vinyl chloride-g-2-ethylhexyl acrylate/acrylonitrile) solutions, they were crystal clear with very low haze values. Table IV lists some of the physical properties of these poly (vinyl chloride-g-2-ethylhexyl acrylate/acrylonitrile) cast films values for a solution blend of the acrylic copolymer and PVC are also included. While tensile strengths of the 1.0/1.5 and 1.0/4.0 acrylic copolymer/PVC-graft/blend films were about 80-90% that of the homopolymer PVC film, they were significantly higher than that of the blend polymer. Furthermore, the crescent tear strengths were higher than those of the blend and the PVC film. Most importantly, the haze values of the graft blend films were much improved over that of the blend polymer, and they more nearly approached that of the homopolymer PVC. 

Although the property of interest in all of the above-mentioned cyano-OPV-containing materials was a mechanically induced change of the photoluminescence color (i.e., a mechanically induced transformation from an excimer-rich to a monomer-dominated emission), certain cyano-OPVs also display a changed of their absorption color upon (dis)assembly. Thus, Kunzelman et al. reported mechanochromic blend films based on C18-RG and either poly(ethylene... 

Mechanosensing behavior of blend films of poly (1,4-butylene succinate) and BBS have also been studied by the same group [51]. 

Uchi5rama, A., and Yatabe, T. (2003). Analysis of extraordinary birefringence dispersion of uniaxially oriented poly(2,6-dimethyl 1,4-phenylene oxide)/atactic pol5rstyrene blend films. Ion. I. Add/. Phvs.. 42, 3503-3507. 

Xiao, C., Liu, H., Gao, S., Zhang, L. Characterization of poly(vinyl alcohol) -konjac glucomannan blend films. Macromol. Sci. Pure Appl. Chem. 37(9), 1009-1021 (2000)... 

KGM and quatemized poly(4-vinyl-iV-butyl) pyridine (QPVP) were miscible when the content of QPVP was less than 30 wt% or in excess of 70 wt%, as confirmed by SEM and XRD [51]. The thermal stability and tensile strength of the films were reduced with increasing content of QPVP, but the elongation at break was the highest at QPVP content of 30 wt%. FTIR indicated that the electrostatic interaction of QPVP and KGM impaired the partial hydrogen bond interaction of KGM. The blend films were able to decrease the lychee fruit weight loss rate and rot rate. 

Liu, C., Xiao, C. Characterization of konjac glucomannan—quatemized poly(4-vinyl-JV-butyl) pyridine blend films and their preservation effect. J. Appl. Polym. Sci. 93, 1868-1875 (2004)... 

Lu, J., Wang, X., Xiao, C. Preparation and eharaeterization of konjae glueomannan/ poly(diallydimethylanunonium chloride) antibacterial blend films. Carbohydr. Polym. 73, 427-437 (2008)... 

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