Poly-p-dioxanone

POM Polarized optical microscopy PPDX Poly(p-dioxanone)... 

There have been relatively few reports dealing with double-crystalline diblock copolymers [102-110,197-200]. The particular case of ABC triblock copolymers with two semicrystalline blocks will be presented in a separate section. Works pertaining to one of the most studied systems PCL-fo-PEO have already been previously reviewed [43]. Recently, probably the most comprehensive studies on double-crystalline diblock copolymer systems were performed on poly(p-dioxanone)-fc-PCL diblock copolymers, PPDX-fr-PCL, and therefore several important aspects of these works [102,103,107] will be summarized in this section. 

Fig. 6 a DSC cooling scans (10°Cmin ) for poly(e-caprolactone) (PCL) and poly(p-dioxanone) (PPDX) homopolymers, diblock copolymers and a 50/50 blend, b Subsequent heating scans (10 °Cmin 1). (From [103], Reproduced with permission of the Royal Society of Chemistry)... 

Hence, the studies /hich fotm the basis of this report were conducted to determine the effect of incorporating different quantities of glycolyl moieties into the poly(p-dioxanone) chains on the physical and biological properties of drawn monofilaments. 

Ethylene oxide sterilized laonofilaments of copolymer II-A and a poly(p-dioxanone) were compared in terms of their in-vivo absorption and BSR (breaking strength retention) profiles. The BSR and absorption studies were conducted in rats according to the procedures described elsewhere. The comparative data of these studies are given in Table V. 

Poly-p-dioxanone and copolymers Poly-p-dioxanone (PDS) Copolymers of PDS and 1-lactide Copolymers of PDS and glycolide Poly-p-dioxanone-co-morpholine-2,5 dione Copolymers of p-dioxanone and polyethlyene-p-phenylene diglycolate Copolymers of polytrimethylene malonate and p-dioxanone A, B, F, G A, B, G A, B, G A, B, G A, B, G, J A, B, G, H... 

Enzymatic, surface-initiated polymerizations of aliphatic polyesters was reported for wider clinical use of aliphatic polyesters 84). The hydroxyl terminated SAM acted as an initiation site for lipase B catalyzed ROP of aliphatic polyesters, such as poly(e-caprolactone) and poly (p-dioxanone) (Scheme 3). Another example of enzymatic SIP is the polymerization of poly (3-hydroxybutyrate) (PHB), where PHB synthase, fused with a His-tag at the N-terminus, was immobilized onto solid substrates through transition-metal complexes, Ni (II)-NTA, and the immobilized PHB synthase catalyzed the polymerization of 3-R-hydroxybutyry 1-coenzyme A (3HB-CoA) to PHB 85). 

AndjeUc, S., Jamiolkowski, D. D., McDivitt, J., Fischer, J. and Zhou, Spher-ulitic growth rates and morphology of absorbable poly(p>-dioxanone) ho-mop>ol3mier and its copol3mier by hot stage optical microscopy, J. Polym. Sd. Polym. Phys. Ed., 39, 3073, 2001. 

Abuzaina, F., Fitz, B. D., Andjelic, S. and Jamiolkowski, D. D., Time resolved study of shear-induced crystallization of poly(p-dioxanone) polymers imder low-shear, nucleation-enhancing shear conditions by small angle Ught scattering and optical microscopy. Polymer, 43, 4699, 2002. 

Williams, D.E and Chu, C.C., 1984. The effects of enzymes and gamma irradiation on the tensile strength and morphology of poly(p-dioxanone) fibers. /. Appl. Polym. ScL, 29 1865-1877. 

Zhu, J. Wang, W.T. Wang, X.L. Li, B. Wang, Y.Z. Green synthesis of a novel biodegradable copolymer base on cellulose and poly(p-dioxanone) in ionic liquid. Carbohydr. Polym. 2009, 76 (1), 139-144. 

Choi and co-workers synthesized 6-amino-1-hexanol-immobilized SWCNTs by immersing the acyl chloride-functionalized SWCNTs into a DMF solution of 6-amino-1-hexanol for 12 h, and grafted poly(p-dioxanone) (PDX) from the SWCNT surfaces by in situ ROP in toluene at 100 °C for 3 days with tin(II) 2-ethylhexanoate [Sn(Oct)2] as the catalyst. The 10% weight-loss temperature of grafted polymer is higher than that of free polymer by approximately 20 °C. 

Park, J.-M., Kim, D.-S. and Kim, S.-R, (2004) Nondestructive evaluation of interfadal damage properties for plasma-treated biodegradable poly(p-dioxanone) fiber/poly(L-lactide) composites by micromechanical test and surface wettability. Composites Science ami Technology, 64, 847-860. 

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