Polyethylene glycol poly composition

One of the cases of such complementarity may be the atactic polymer which can be considered as a copolymer of isotactic and syndiotactic links. Indeed, the composition and properties of the polycomplex depend on the chain stereoregularity, for example in the case of poly(methyl methacrylate) stereocomplexes16 and polyethylene glycol) with isotactic or atactic PAA complexes33. ... 

The 7Li MAS-NMR spectrum of a mesoporous silica (BBA-15) composite with LiC104/poly(ethylene oxide) showed the existence of three types of Li+ coordination.15 111 and 7Li NMR spectra were used to characterise the new solid polymer (PEG)xLiC104, where PEG = polyethylene glycol.16... 

PHA blends with poly(vinyl alcohol) (PVA) are interesting materials whose miscibility depends on the composition and the PVA tacticity [178]. PHB is claimed to be miscible with polyethylene glycol [179] and with poly D-lactide [180] its miscibility with polyethylene oxide depends on the blend composition [181]. Immiscible, but well-compatible blends of PHB, were prepared with poly(butylene succinate-co-butylene adipate) and poly(butylene succinate-co-caprolactone) [182]. 

Polyethylene glycol (PEG) is another well-known molecule used to reduce protein adsorption and/or platelet adhesion. Surface enrichment of a triblock oligomeric PEG containing additive from a polyurethane matrix was reported [54,55]. The authors used PEG as the active groups to suppress protein and platelet adhesion. The authors first synthesized a methylene diphenyl diisocyanate (MDI)-poly (tetramethylene oxide) (PTMO) 1000 prepolymer with a MW of approximately 4750 (PU4750), and then this prepolymer was terminally functionalized with mono amino-polyethylene oxide (PEG) with different MW (PEO550, 2000, or 5000, Table 2.3). This triblock copolymer was mixed with a polyurethane (MDI/ PTMO 1000/ethylene diamine (ED)) at different ratios in dimethylformamide (DMF) and cast into polymer films. The surface compositions of these films were evaluated by XPS. 

They also used modified impregnation method to make ceUulose/cellulose nanocomposites. These nanocomposites also showed improved tensile and creep properties over neat CNCs. They then used melt compounding technique to manufacture CNC/poly(Iaclic acid) nanocomposites, where polyethylene glycol (PEG) was used as plasticizer and maleic anhydride (MA) was used as a coupling agent. Composites made with and without plasticizer both showed increase in tensile properties. However, the maximum improvement in tensile properties was observed for composites made without plasticizer. The tensile modulus of these composites for 5 wt% CNCs improved by about 35 %, the tensile strength by about 90 %, and elongation to break by about 35 %. 

Combinatorial libraries were employed to optimize microphase domain size and shape of polyethylene glycol (PEG) - poly(caprolactone) (PCL) polyurethanes, and their blends with PCL. Polyurethanes are used as biomaterials in a variety of applications, and the ability to tune microdomain size to enhance cell attachment is a desirable objective. These materials incorporate biocompatible PCL microdomains, to which cells can adhere, into a relatively non-adhesive PEG-PCL matrix. A region of chain extender composition and curing temperature, with controllable spherical-, wormlike-, and ribbon-shaped microdomains, was located through a series of increasingly focused libraries. Osteoblast-like cells (MC3T3-E1) cultured directly on selected libraries showed attachment density correlated with the distance to and size of nearby PCL microdomains. 

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