Synthesis and characterization of poly(butylene succinate) and its copolyesters containing minor amounts of propylene succinate

Chen, Chi-He; Peng, Jyun-Siang; Chen, Ming; Lu, Hsin-Ying; Tsai, Chia‐Jung; Yang, Chao-Sen

doi:10.1007/s00396-010-2187-9

Cited by 39 publications

(44 citation statements)

References 42 publications

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“…Integration of these four peaks can be adopted to characterize the chemical microstructures of the synthesized copolymers. 29 The total areas of the four peaks were normalized to one for each copolymer, and the percentage values of each peak area are given in Table 2 under the subtitles CL-CL, CL-Ad, Ad-CL, Ad-Ad. From normalized areas three possible triad sequences (CL-CL-CL, CL-Ad-CL or Ad-CL-Ad, and Ad-Ad-Ad) of copolymers were calculated and presented also in Table 2.…”

Section: Polyester Characterizationmentioning

confidence: 99%

Synthesis of biocompatible poly(ε-caprolactone)-block-poly(propylene adipate) copolymers appropriate for drug nanoencapsulation in the form of core-shell nanoparticles

Nanaki¹,

Pantopoulos²,

Bikiaris³

2011

IJN

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Poly(propylene adipate)-block-poly(ε-caprolactone) copolymers were synthesized using a combination of polycondensation and ring-opening polymerization of ε-caprolactone in the presence of poly(propylene adipate). Gel permeation chromatography was used for molecular weight determination, whereas hydrogen-1 nuclear magnetic resonance and carbon-13 nuclear magnetic resonance spectroscopy were employed for copolymer characterization and composition evaluation. The copolymers were found to be block while their composition was similar to the feeding ratio. They formed semicrystalline structures, while only poly(ε-caprolactone) formed crystals, as shown by wide angle X-ray diffraction. Differential scanning calorimetry data suggest that the melting point and heat of fusion of copolymers decreased by increasing the poly(propylene adipate) amount. The synthesized polymers exhibited low cytotoxicity and were used to encapsulate desferrioxamine, an iron-chelating drug. The desferrioxamine nanoparticles were self-assembled into core shell structures, had mean particle size ,250 nm, and the drug remained in crystalline form. Further studies revealed that the dissolution rate was mainly related to the melting temperature, as well as to the degree of crystallinity of copolymers.

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Section: Polyester Characterizationmentioning

confidence: 99%

Synthesis of biocompatible poly(ε-caprolactone)-block-poly(propylene adipate) copolymers appropriate for drug nanoencapsulation in the form of core-shell nanoparticles

Nanaki¹,

Pantopoulos²,

Bikiaris³

2011

IJN

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“…To perform quantitative 13 C NMR measurement, it is important to take into account the difference of spin-lattice relaxation time among different carbons. 13 C NMR was conducted using a 30-s pulse cycle [34] to determine both the composition and the ester sequence distribution in these copolyesters.…”

Section: Nmr Analysesmentioning

confidence: 99%

“…These copolyesters with a low degree of crystallinity and slower crystallization rate exhibited a higher biodegradation rate than PBSu. Recently, Chen et al [34] also synthesized and characterized a series of PBSu-rich PBPSu copolyesters by combining PBSu with a high melting point and PPSu with high biodegradability. They also reported that incorporating propylene succinate units to PBSu not only narrows the window between the glass transition temperature (T g ) and T m , but also retards the cold crystallization ability, thereby lowering the crystallinity to a considerable extent.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of novel poly(butylene succinate-co-2-methyl-1,3-propylene succinate)s

Chen¹,

Yang²,

Chen

et al. 2011

Express Polym. Lett.

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Abstract. Poly(butylene succinate) (PBSu), poly(2-methyl-1,3-propylene succinate) (PMPSu), and PBSu-rich copolyesters were synthesized using an effective catalyst, titanium tetraisopropoxide. Measurements of intrinsic viscosity (1.20-1.28 dl/g) and gel permeation chromatography demonstrated the success of the preparation of polyesters with high molecular weights. The compositions of the copolyesters were determined in three approaches from 1 H and 13 C NMR (nuclear magnetic resonance) analyses, and good agreement between the results was obtained. The distributions of the comonomers were found to be random from the spectra of carbonyl carbon. Their thermal properties were elucidated using a differential scanning calorimeter and a thermogravimetric analyzer. No marked difference exists among the thermal stabilities of these polyesters. However, the window between the glass transition and the melting temperatures becomes narrower with the increase in the concentration of 2-methyl-1,3-propylene succinate in the copolymers. Additionally, the cold crystallization ability decreases considerably. Finally, PMPSu is an amorphous homopolymer. Wide-angle X-ray diffractograms of isothermally crystallized copolyesters also follow the same trend.

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“…As bandas na região de 1044 cm -1 foram relacionadas às vibrações de alongamento das ligações O-C-C no PBS [19] . A banda em torno de 3453 cm -1 pode ser atribuída ao grupo terminal hidroxila do PBS [20] . Também é possível visualizar bandas na região de 914 cm -1 que corresponde a grupos vinil.…”

Section: Ftir-atrunclassified

Preparo de nanocompósitos de poli(succinato de butileno) (PDS) e argila motmorilonita organofílica via polimerização in situ

et al. 2014

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Resumo: Nanocompósitos de poli(succinato de butileno) (PBS) e argila montmorilonita organofílica foram sintetizados via polimerização in situ, em três diferentes concentrações (4, 6 e 8% em massa). Os produtos obtidos foram caracterizados por diversas técnicas. Entre elas, a difração de raios X foi útil para comprovar o aumento do espaçamento interlamelar da argila devido à incorporação das cadeias de polímero. As técnicas de análise térmica mostraram que o método de polimerização in situ gerou materiais com menores estabilidades térmicas, comparadas ao polímero puro, devido à dificuldade de crescimento das cadeias de polímero na presença da argila. A técnica de RMN de baixo campo permitiu identificar que a estrutura esfoliada predomina nos nanocompósitos. Palavras Preparation of Nanocomposites Based on Poly(Butylene Succinate) and Montmorillonite Organoclay via In Situ PolymerizationAbstract: Nanocomposites based on poly(butylene succinate) (PBS) and organophilic montmorillonite were synthesized via in situ polymerization using three different clay compositions (4, 6 and 8 wt%). The products were characterized by several different techniques. X-ray diffraction was useful to confirm the increase of the interlayer spacing of the clay due to the presence of the polymer chains among layers. Thermal analysis indicated that the polymerization method chosen led to materials with lower thermal stability compared to the pure PBS, due to the difficulty of chain growth in the presence of the clay. Low-field NMR technique was used to assess clay dispersion in the polymer, with exfoliated structures predominating in the nanocomposites. Keywords:Poly(butylene succinate), biodegradable polymer, organophilic clay nanocomposite, in situ polymerization. IntroduçãoO desenvolvimento de materiais poliméricos biodegradáveis com boas propriedades tem se tornado o foco de pesquisas ao redor do mundo na tentativa de solucionar o problema do acúmulo de resíduos sólidos. Além disso, deseja-se reduzir a dependência de recursos fósseis para a fabricação de diversos produtos a partir do desenvolvimento de materiais poliméricos "verdes", que podem ser reciclados ou degradados em ambiente controlado [1] .Os poliésteres alifáticos têm sido considerados por muitos, como os materiais biodegradáveis mais competitivos do futuro, o que incentiva a pesquisa desse polímero por diversos grupos [2] . Estes poliésteres podem ser degradados na forma de CO 2 e H 2 O pela ação de enzimas ou micro-organismos, em condições específicas de compostagem, porém são estáveis em atmosfera normal [3] . Entre eles, o PBS é um poliéster alifático que pode ser sintetizado quimicamente por meio da policondensação do 1,4-butanodiol com o ácido succínico, ambos biomonômeros de origem renovável, obtidos a partir da biomassa, apresentando, portanto, menores custos de produção em relação aos produtos similares provenientes do petróleo [4] . Além disso, o PBS possui propriedades vantajosas, como boas resistências térmica (estável até aproximadamente 200 °C) e química (estabi...

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Synthesis and characterization of poly(butylene succinate) and its copolyesters containing minor amounts of propylene succinate

Cited by 39 publications

References 42 publications

Synthesis of biocompatible poly(ε-caprolactone)-block-poly(propylene adipate) copolymers appropriate for drug nanoencapsulation in the form of core-shell nanoparticles

Synthesis of biocompatible poly(ε-caprolactone)-block-poly(propylene adipate) copolymers appropriate for drug nanoencapsulation in the form of core-shell nanoparticles

Synthesis and characterization of novel poly(butylene succinate-co-2-methyl-1,3-propylene succinate)s

Preparo de nanocompósitos de poli(succinato de butileno) (PDS) e argila motmorilonita organofílica via polimerização in situ

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Synthesis and characterization of poly(butylene succinate) and its copolyesters containing minor amounts of propylene succinate

Cited by 39 publications

References 42 publications

Synthesis of biocompatible poly(&epsilon;-caprolactone)-block-poly(propylene adipate) copolymers appropriate for drug nanoencapsulation in the form of core-shell nanoparticles

Synthesis of biocompatible poly(&epsilon;-caprolactone)-block-poly(propylene adipate) copolymers appropriate for drug nanoencapsulation in the form of core-shell nanoparticles

Synthesis and characterization of novel poly(butylene succinate-co-2-methyl-1,3-propylene succinate)s

Preparo de nanocompósitos de poli(succinato de butileno) (PDS) e argila motmorilonita organofílica via polimerização in situ

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Synthesis of biocompatible poly(ε-caprolactone)-block-poly(propylene adipate) copolymers appropriate for drug nanoencapsulation in the form of core-shell nanoparticles

Synthesis of biocompatible poly(ε-caprolactone)-block-poly(propylene adipate) copolymers appropriate for drug nanoencapsulation in the form of core-shell nanoparticles