Studying the miscibility and thermal behavior of polybenzoxazine/poly(ε-caprolactone) blends using DSC, DMA, and solid state 13C NMR spectroscopy

Huang, Jieh-Ming; Yang, Shaoxiang

doi:10.1016/j.polymer.2005.06.104

Cited by 90 publications

(65 citation statements)

References 31 publications

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“…The latter value was taken as 136 J/g as reported by Huang and Yang. 31 Uniaxial tensile test were carried out on dog-bone specimens according to ASTM D 1708. Mechanical tests were performed at 1.2 mm/min to rupture by an electromechanical machine equipped with a 5 kg load cell (TA-HDi, Stable Micro Systems, UK).…”

Section: Cðk; Brþmentioning

confidence: 99%

Structural characterization and cell response evaluation of electrospun PCL membranes: Micrometric versus submicrometric fibers

Gaudio

Bianco

Folin

et al. 2008

J Biomedical Materials Res

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Electrospinning is a valuable technique to fabricate fibrous scaffolds for tissue engineering. The typical nonwoven architecture allows cell adhesion and proliferation, and supports diffusion of nutrients and waste products. Poly(epsilon-caprolactone) (PCL) electrospun membranes were produced starting from 14% w/v solutions in (a) mixture 1:1 tetrahydrofuran and N,N-dimethylformamide and (b) chloroform. Matrices made up of randomly arranged uniform fibers free of beads were obtained. The average fiber diameters were (a) 0.8 +/- 0.2 microm and (b) 3.6 +/- 0.8 microm. PCL matrices showed the following tensile mechanical properties: tensile modulus (a) 5.0 +/- 0.7 MPa (b) 6.4 +/- 0.2 MPa, yield stress (a) 0.55 +/- 0.06 MPa (b) 0.43 +/- 0.02 MPa, and ultimate tensile stress (a) 1.7 +/- 0.2 MPa and (b) 0.8 +/- 0.1 MPa. The ultimate strain ranged between 300% and 400%. Cytotoxicity of electrospun membranes was continuously evaluated by means of electric cell-substrate impedance sensing technique using human umbilical vein endothelial cells (HUVEC). PCL matrices resulted free of toxic amounts of contaminants and/or process by-products. In vitro studies performed by culturing HUVEC on micrometric and submicrometric fibrous mats showed that both structures supported cell adhesion and spreading. However, cells cultured on the micrometric network showed higher vitality and improved interaction with the polymeric fibers, suggesting an increased ability to promote cell colonization.

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Section: Cðk; Brþmentioning

confidence: 99%

Structural characterization and cell response evaluation of electrospun PCL membranes: Micrometric versus submicrometric fibers

Gaudio

Bianco

Folin

et al. 2008

J Biomedical Materials Res

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“…5 For the polymer blend, both crystalline and amorphous phases could be distinguished by 1 H spin-lattice relaxation time (T 1 H: in the laboratory frame; T 1q H: in the rotation frame) analysis, which also elucidated the mobility difference between the phases. 6 Furthermore, using the cross polarization time and T 1q H, the relationship between morphology and mechanical properties was revealed for poly(ethylene terephthalate) with natural rubber. 7 On the other hand, solid state NMR studies on poly(L-lacide) (PLA) in ''fiber form'' are very limited; to our knowledge, only the draw direction of PLA films has been investigated by solid state 13 C NMR to date.…”

Section: Introductionmentioning

confidence: 99%

Solid state NMR analysis of poly(L‐lactide) random copolymer with poly(ε‐caprolactone) and its reactive extrusion process

Nishida

Nishimura

Tanaka

et al. 2011

J of Applied Polymer Sci

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A random copolymer based on poly(L-lactide) (PLA) with poly(e-caprolactone) (PCL) was prepared and characterized by mechanical testing and solid state NMR, compared with a polymer blend. For a monofilament sample consisting of PLA/PCL random copolymer, there were negative correlations between the CL content and the mechanical properties: tensile strength, tensile elastic modulus, flexural rigidity, and flexural hysteresis decreased with increasing CL content. In contrast, the mechanical properties of the polymer blend were only slightly changed by addition of the CL unit. For the random copolymer, the addition of a small amount of CL reduced relaxation times, T 1 C and T 1q H, gradually. The T 1 C and T 1q H values correlated closely with the tensile elastic modulus and the tensile strength, respectively.

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“…where D is the diffusion coefficient, taken to be 4-6 × 10 −16 m 2 /s for PCL (Huang & Yang, 2005). Substitution of the T H 1 data obtained above into this equation leads to the assessment of L as an upper limit of the heterogeneous domain size in the relevant blends.…”

Section: Quantification Of Domain Size By T H 1 Measurementmentioning

confidence: 99%

Fabrication of thermoplastic ductile films of chitin butyrate/poly(ɛ-caprolactone) blends and their cytocompatibility

Hashiwaki

Teramoto

Nishio

2014

Carbohydrate Polymers

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We fabricate thermoplastic films of chitin burtyrate (ChB)/poly(ɛ-caprolactone) (PCL) blends with different degree of miscibility (miscible (M), partially miscible (PM), and immiscible (IM)), and examined the feasibility as a cell scaffold system through evaluating mechanical properties and cytocompatibility. We found a remediation of the brittleness and an increase in ductility of ChB by blending PCL for the M and PM blends. The blend films were subjected to alkaline hydrolysis (2-M NaOH/37°C/48 h) with expectation of the improvement of the surface hydrophilicity and cell accessibility. ATR-FTIR spectroscopy of the alkaline-treated PM and IM films revealed that PCL component and ester side-chains of acyl chitin were selectively removed from the surface domain. L929 fibroblast cells well adhered and proliferated on these films. Therefore, the materials possess a great potential for the utilization as a thermoplastic cell scaffold in tissue engineering by adequate selection of the degree of miscibility and post treatment.

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Studying the miscibility and thermal behavior of polybenzoxazine/poly(ε-caprolactone) blends using DSC, DMA, and solid state 13C NMR spectroscopy

Cited by 90 publications

References 31 publications

Structural characterization and cell response evaluation of electrospun PCL membranes: Micrometric versus submicrometric fibers

Structural characterization and cell response evaluation of electrospun PCL membranes: Micrometric versus submicrometric fibers

Solid state NMR analysis of poly(L‐lactide) random copolymer with poly(ε‐caprolactone) and its reactive extrusion process

Fabrication of thermoplastic ductile films of chitin butyrate/poly(ɛ-caprolactone) blends and their cytocompatibility

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