Synthesis, characterization and thermal properties of a novel star polymer consisting of poly(ε-caprolactone) arms emanating from an octa-functional porphyrazine core

被引：27

作者：

Celik, Asuman ^{[1
]}

Kemikli, Nurufe ^{[2
]}

Ozturk, Ramazan ^{[2
]}

Muftuoglu, Ali Ekrem ^{[2
]}

Yilmaz, Faruk ^{[1
]}

机构：

[1] Gebze Inst Technol, Dept Chem, TR-41400 Gebze, Kocaeli, Turkey

[2] Fatih Univ, Dept Chem, TR-34500 Istanbul, Turkey

来源：

REACTIVE & FUNCTIONAL POLYMERS | 2009年 / 69卷 / 09期

关键词：

Star-shaped poly(epsilon-caprolactone); Ring-opening polymerization; Porphyrazine initiator; Crystallization; RING-OPENING POLYMERIZATION; EPSILON-CAPROLACTONE; CRYSTALLIZATION KINETICS; BRANCHED POLYESTERS; COPOLYMERS; POLYLACTONES; MORPHOLOGY; DENDRIMER; CATALYSTS; EFFICIENT;

D O I：

10.1016/j.reactfunctpolym.2009.05.005

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Octaarmed star-shaped poly(epsilon-caprolactone) (OSPCL) was successfully synthesized via the ring-opening polymerization (ROP) of epsilon-caprolactone (epsilon-CL) with a magnesium porphyrazine as the multisite initiator and tin(II) 2-ethylhexanoate (Sn(Oct(2))) as the catalyst in bulk at 115 degrees C. The star polymer has a central Mg-porphyrazine surrounded by epsilon-CL arms. OSPCL was characterized by H-1 NMR, FTIR, GPC and UV-vis, and fluorescent spectroscopy. The effect of the molar ratio of the monomer to the initiator on molecular weight of the polymer was also investigated. The molecular weight of the polymer linearly increased with increasing molar ratio of the monomer to the initiator. The crystallization behavior of OSPCL was studied using differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). OSPCL displayed an interrupted crystal morphology owing to its highly branched architecture, and consequently, the degree of crystallinity was lower in comparison with the linear analogue. Thermogravimetric analysis (TGA) clearly indicated that incorporation of porphyrazine core enhanced the thermal stability of the resulting polymers. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：705 / 713

页数：9

共 51 条

[1]

AKKUS H, 2000, TRANSIT METAL CHEM, V26, P689

[2] Recent developments in ring opening polymerization of lactones for biomedical applications [J].

Albertsson, AC ;

Varma, IK .

BIOMACROMOLECULES, 2003, 4 (06) :1466-1486

[3]

Aoi K, 1999, MACROMOL RAPID COMM, V20, P378

[4] Thermal degradation of poly[(R)-3-hydroxybutyrate], poly[ε-caprolactone], and poly[(S)-lactide] [J].

Aoyagi, Y ;

Yamashita, K ;

Doi, Y .

POLYMER DEGRADATION AND STABILITY, 2002, 76 (01) :53-59

[5] Porphyrazinediols: Synthesis, characterization, and complexation to group IVB metallocenes [J].

Bellec, N ;

Montalban, AG ;

Williams, DBG ;

Cook, AS ;

Anderson, ME ;

Feng, XD ;

Barrett, AGM ;

Hoffman, BM .

JOURNAL OF ORGANIC CHEMISTRY, 2000, 65 (06) :1774-1779

[6] Synthesis and characterisation of star branched polyesters with dendritic cores and the effect of structural variations on zero shear rate viscosity [J].

Claesson, H ;

Malmström, E ;

Johansson, M ;

Hult, A .

POLYMER, 2002, 43 (12) :3511-3518

[7] Designing biodegradable multiblock PCL/PLA thermoplastic elastomers [J].

Cohn, D ;

Salomon, AF .

BIOMATERIALS, 2005, 26 (15) :2297-2305

[8] Synthesis and characterization of mid- and end-chain functional telechelics by controlled polymerization methods and coupling processes [J].

Colak, D ;

Cianga, I ;

Muftuoglu, AE ;

Yagci, Y .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2006, 44 (02) :727-743

[9] Synthesis, characterization, and thermal stability of star-shaped poly(ε-caprolactone) with phosphazene core [J].

Cui, YJ ;

Ma, XM ;

Tang, XZ ;

Luo, YP .

EUROPEAN POLYMER JOURNAL, 2004, 40 (02) :299-305

[10] Supramolecular polypseudorotaxanes composed of star-shaped porphyrin-cored poly(ε-caprolactone) and α-cyclodextrin [J].

Dai, Xiao-Hui ;

Dong, Chang-Ming ;

Fa, Huan-Bao ;

Yan, Deyue ;

Wei, Yen .

BIOMACROMOLECULES, 2006, 7 (12) :3527-3533

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