Poly blends containing

Koleske, J. V., Blends containing poly( e-caprolactone) and related polymers, in Polymer Blends. Vol. 2 (D. R. Paul and S. Newman, eds.). Academic Press, New York, 1978, pp. 369-389. 

Crystallization behavior in miscible blends containing crystallizable components has been extensively studied [174-180]. Generally, when a crystallizable component is mixed with an amorphous component its melting temperature goes down and its crystallinity lowers. The same trend has been reported for blends with intercomponent hydrogen bonding such as PCL/STVPh [181], PCL/poly(hydroxyl ether of bisphenol A) [182] and phenoxy resin/PEO [183]. 

Terpolymer blends containing poly(tetrafluoroethylene-co-perfluoro-a-olefins) and platinum nanoparticles imbedded in Nation 1100 fluoropolymer resin were previously prepared by the authors (1) and used as electrodes in fuel cells. 

T50I(NPG)/PMDA was of particular interest because of its adhesive characteristics, oxidative stability, and polymer cost. Table III shows the improvement in adhesion obtained when various substrates were coated with blends containing this polyester (acid number 39). As indicated in the table, the ease of obtaining adhesion on the different substrates decreased approximately in the following order brass > steel > copper > chrome-coated steel > aluminum > nylon 66 > poly (ethylene terephthalate). In spite of the wide differences in structure and polarity of the various polymers, the carboxylated polyester significantly improved the adhesion of the coatings. 

Strengths of films made from a starch-poly(vinyl alcohol) blend containing glycerol and poly(ethylene-co-acrylic acid) have been examined.166 High-amylose starches produced films with the most consistent properties. In a process for extruded blown film, blending of high-amylose starch with starches with more typical amylose contents and plasticizers or gelatinization aids improved properties.167 Extruded... 

Blends Containing Poly(Vinylidene Fluoride), Part IV, unpublished data. 

Blends Containing Poly (vinylidene Fluoride), Part I, Polym. Eng. Sci. 

The behaviour of an adipic acid-based polymeric plasticiser for poly(vinyl chloride)s, developed to give improved low temperature flexibility, was compared with that of a conventional adipate plasticiser of the same molecular weight. Blends containing 50 phr plasticiser were prepared. The new plasticiser exhibited a similar softening efficiency and permanence whilst improving the glass transition and brittle temperatures (3-4 C lower). The dry blend time was reduced by 10%. The viscosity of the new plasticiser was 25% lower than that of comparable conventional adipates. 1 ref. 

Standstrom [3] improved the elongation at break properties of tires by blending 70% di-poly(l,4-isoprene) with 30% poly(butadiene) containing a high trans content. The latter was prepared using barium di(ethylene glycol) ethyl ether, tri-octyl aluminum, and n-butyllithium as the reaction catalyst mixture. 

Poly[(4,4 -(Hexafluoroisopropylidene)-(4,4 -(Hexafluoro-Isopropylidene)-Phthalimide] Film Blend Containing bis[(l,2-Trifluoromethyl)Ethylene-1,2-Dithiolato] Nickel(II)... 

Blends of syndiotactic styrene-/ -methylstyrene copolymers (SPMS) with poly(styrene)-block-poly(ethylene-co-butylene)-block-polystyrene (SEBS) has been reported. [21] No significant effects on the tensile modulus and strength were observed for blends containing less than 10% SEBS. SEM of drawn samples of the blends showed that the dispersed SEBS phase had been extended to about the same extent as the bulk blend, indicating good adhesion between the two phases. 

In addition to copolymers, various blends containing polyalkylstyrenes are used in practice. One such polymer is poly(4-methoxystyrene) 1/1 w/w blend bisphenol A polycarbonate. The thermal decomposition of this polymer when heated from ambient to 500° C generates CO2, 4-methoxystyrene, a-methyl-4-methoxystyrene, p-cresol and small amounts of other phenols, poly (4-methoxystyrene), dimer and trimer with vinylidene and saturated ends, polycarbonate cyclic dimer and chain fragments, bisphenol A, etc. [94]. 

Most notable among the Dow copolymers is poly(9,9-dioctylfluorene-a//-benzothiadiazole) (F8BT). Figure 10.24 shows the absorption and fluorescence spectra of a blend containing 95% PFO and 5% F8BT the copolymer repeat unit... 

Verghoogt, H., Ramsay, B.A., and Pavis, B.D. Polymer blends containing poly (3-hydroxyalkanoate)s, Polym. Rev., 35,5155,1994. 

For a crystalline/crystalline blend, Yoshie et al. [151] studied blends of PVA and poly(3-hydroxybutyrate) (PHB). They found that PVA/PHB is compatible only when the blend contains a larger amount of PVA, and Model C was found with amorphous and crystalline PHB. Kwak et al. [94] studied poly(ether-ester)/PVC to find a common Ti, but double-exponential Tip decays. Model B was proposed with a mixed amorphous phase and two microcrystalline phases for component polymers. Note that Guo [95] reexamined this blend and pointed out that these assignments have to be reconsidered. 

There is much interest in the formation of blends of poly(imide)s with other polymers, so as to improve properties such as toughness and processability [14-19, 58, 59]. The subject of measurement of interactions and miscibility of blends by NMR spectroscopy has been discussed by Takagoshi and Asano in Chapter 10 of this book, and will not be referred to in detail here. The use of NMR to study miscibility in blends containing poly(imide)s is somewhat restricted because most poly(imide)s contain a high proportion of aromatic groups, and consequently form blends with other highly aromatic polymers. The CPMAS spectra, which as discussed above are broad and... 

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