Dynamic caprolactone

To date, the melt state linear dynamic oscillatory shear properties of various kinds of nanocomposites have been examined for a wide range of polymer matrices including Nylon 6 with various matrix molecular weights [34], polystyrene (PS) [35], PS-polyisoprene (PI) block copolymers [36,37], poly(e-caprolactone) (PCL) [38], PLA [39,40], PBS [30,41], and so on [42],... 

Ishida, H., and I.cc, Y.-H. (2001). Synergism observed in polybenzoxazine and poly(e-caprolactone) blends by dynamic mechanical and thermogravimetric analysis. Polymer 42(16), 6971-6979. 

The compatibility, mechanical properties, and segmental orientation characteristics of poly-e-caprolactone (PCL) blended with poly (vinyl chloride) (PVC) and nitrocellulose (NC) are described in this study. In PVC blends, the amorphous components were compatible from 0-100% PCL concentration, while in the NC system compatibility teas achieved in the range 50-100% PCL. Above 50% PCL concentration, PCL crystallinity was present in both blend systems. Differential IR dichroism was used to follow the dynamic strain-induced orientation of the constituent chains in the blends. It was found for amorphous compatible blends that the PCL oriented in essentially the same manner as NC and the isotactic segments of PVC. Syndio-tactic PVC segments showed higher orientation functions, implying a microcrystalline PVC phase. 

The results of a study of the relation between the oriented structure and drawn poly(e-caprolactone) specimens including CaCO particles, their dynamic mechanical properties and line shape analyses of CP MAS NMR spectra are presented. Solid state studies of C NMR study of poly(methyl acrylate) ionomer have been reported. ... 

Choulak et al. (2004) Polymerization of caprolactone A one-dimensional dynamic model of a twin-screw reactive extrusion Predicts pressure, filling ratio, temperature, molar conversion profiles and residencetime distributions under various operating conditions... 

FIGURE 10.21 Thermorheological properties of poly(e-caprolactone) as determined using dynamic mechanical thermal analysis (film geometry, 50-pm amplitude, and 1 Hz). 

Vangeyte, P., Gautier, S. and Jerome, R., 2004. About the methods of preparation of poly(ethylene oxide)-b-poly(e caprolactone) nanoparticles in water Analysis by dynamic light scattering. Colloids and Surfaces A Physicochemical and Engineering Aspects, 242, 203-211. 

NMR Studies of the Dynamics of Homo- and Block-Copolymer Poly( -caprolactone) Chains in Their Inclusion Compounds with a- and y-CDs... 

Tsuji, H. and Suzuyoshi, K. (2002) Environmental degradation of biodegradable polyesters 2. Poly(e-caprolactone), poly[(R)-3-hydroxybutyrate], and poly(L-lactide) films in natural dynamic seawater. Polymer Degradation and Stability, 75, 357-363. 

By copolymerizing the monomers of two highly crystalline homopolymers it is possible to create a series of less crystalline copolymers with reduced levels of stiffness, elastic modulus and crystallinity depending on the blend level of the two monomers. This has been demonstrated by Soo H5nm Kim and coworkers at KIST, who have been able to synthesize a series of elastomeric (or rubbery) resorbable poly(L-lactide-co-e-caprolactone) copolymers. Because of their superior elastic behavior they have been used to prepare tubular scaffolds for vascular smooth muscle cell (SMC) culture under dynamic pulsatile conditions. We have melt spun and electrospun the 50/50 copolymer to fabricate a two-layer small-caliber vascular prosthesis prototype with radial elongation at break in excess of 300% (Fig. 15.33). " ... 

The structure and dynamics of surfactant and polymer chains in intercalated poly(8-caprolactone)/ clay nanocomposites are characterized by P magic-angle spinning (MAS) and C cross-polarization MAS NMR techniques. To obtain hybrid materials with the low polymer content required for this study, in situ intercalative polymerization was performed by adapting a published procedure. After nanocomposite formation, the chain motion of the surfactant is enhanced in the saponite-based materials but reduced in the laponite ones. Compared to the initial clay, the trani -conformer population of the surfactant hydrocarbon chains in the nanocomposite decreases for the saponite systems. Mobility of the polymer chain is higher in the nanocomposites than in the bulk phase. The charge of the modified saponite does not significantly inflnence chain mobility in the nanocomposites. 

D.M. Le, K. Kulangara, A.F. Adler, K.W. Leong, V.S. Ashby, Dynamic topographical control of mesenchymal stem cells by culture on responsive poly( -caprolactone) surfaces, Adv. Mater. 23 (August 2, 2011) 3278-3283. 

It was also reported that the thermal stability of the aliphatic polyesters, i.e. poly (e-caprolactone) (PCL), poly(gfycolide) (PGA), and poly(D,L-lactide) (PLA) investigated under dynamic heating in an inert atmopshere, based on the peak decomposition temperature, was in the order of PCL > PGA > PLA [44],... 

Dos Santos Rosa D., Volponi J.E., das Gramas Eassina Guedes C. Biodegradation and the dynamic mechanical properties of starch gelatinization in poly(e-caprolactone)/com starch... 

The structure and dynamics of surfactant and polymer chains in intercalated poly(6-caprolactone)/clay nanocomposites are characterised by P MAS and C CP MAS NMR. " ... 

Sheu, H.S., Lai, Y.H., and Shih, K.S. (2007) Dynamic interplay between phase separation and crystallization in a poly (e-caprolactone)/poly(ethylene glycol) oligomer blend. Polymer, 48 (10), 2919-2927. 

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