Radiopaque, barium sulfate‐filled biomedical compounds of a poly(ether‐block‐amide) copolymer

Guo, Xiaoping

doi:10.1002/app.28505

Cited by 12 publications

(12 citation statements)

References 37 publications

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“…Three relaxation processes were observed in the tanδtemperature curve. The observed reinforcement by loading PEU with BaSO 4 particles can be explained by apparent nucleating effects of BaSO 4 for PEU which was also detected for other polymer composites filled with BaSO 4 [10]. The second relaxation process with a pronounced peak maximum T g,mix reflects the glass transition of the mixed phase of H 12 MDI / BD and H 12 MDI / PTMEG segments.…”

Section: Thermal and Mechanical Propertiessupporting

confidence: 53%

Shape-Memory Properties of Radiopaque Micro-Composites from Amorphous Polyether Urethanes Designed for Medical Application

2009

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Biocompatible shape-memory polymers are of high significance for application in medical devices or instruments for minimally invasive surgery. To follow the medical device placement or changes in shape of the device in vivo by imaging methods like X-ray techniques, radiopacity of the polymer is required. In this work, we explored the shape-memory properties of radiopaque polymer composites prepared by incorporation of barium sulphate micro-particles in a biomedical grade polyether urethane (PEU) by co-extrusion technique. The filler content was varied from 5 wt% to 40 wt%, which was confirmed by thermal gravimetric analysis (TGA) measurements, while the particle distribution was visualized by scanning electron microscopy (SEM). The thermal and mechanical properties of the composites were investigated by means of dynamic mechanical analysis at varied temperature (DMTA) and tensile tests. The shapememory properties of PEU composites were quantified in cyclic, thermomechanical experiments. A significant increase in Young's modulus and a decrease in elongation at break were observed for PEU composites with increasing content of BaSO 4 , while the DMTA results were not affected by incorporation of the fillers. All samples exhibited excellent shape-memory properties with shape fixity rates (R f ) above 98% and values for shape recovery rate (R r ) in the range of 81% to 93%. The maximum stress (σ max ) obtained under constant strain recovery conditions increased from 0.6 MPa to 1.4 MPa with raising amount of BaSO 4 , while the corresponding temperature (T σ,max ) as well as the switching temperature (T sw ) determined under stress-free conditions remained constant for all polymer composites.

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Section: Thermal and Mechanical Propertiessupporting

confidence: 53%

Shape-Memory Properties of Radiopaque Micro-Composites from Amorphous Polyether Urethanes Designed for Medical Application

2009

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“…Types of radiopaque reinforcements used for biomedical applications so far usually affect the quality of the X-ray image, and the mechanical, rheological, thermal and optical properties of the matrix are changed [15,16] . Barium sulfate (BaSO 4 ) has been used as a reinforcement for polymers and as a radiopaque agent in bones and in dental applications because of its resistance to high temperatures, acids and alkalis [14,16,17] . Recently, the blend of POM with micrometric-size particles of BaSO 4 was analyzed, although the biological response of the periprosthetic tissue in the presence of the blend was not studied in detail [18] .…”

Section: Introductionmentioning

confidence: 99%

Influence of X-ray opaque BaSO4 nanoparticles on the mechanical, thermal and rheological properties of polyoxymethylene nanocomposites

Romero‐Ibarra

Bonilla-Blancas

Sanchez-Solis

et al. 2012

Journal of Polymer Engineering

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This work evaluates the infl uence of a radiopaque reinforcement, barium sulfate (BaSO 4 ), on the mechanical, rheological and thermal properties of polyoxymethylene (POM). Nanocomposites of POM containing spherical nanoparticles of BaSO 4 (0, 1, 2, 3 phr) were obtained by melt extrusion in a twin-screw equipment followed by injection molding. The mechanical, thermal and rheological properties of these nanocomposites and the dispersion state of the particles were investigated. Scanning and transmission electron microscopy revealed the morphology of the products. The main objective of this work is the production of nanocomposites with sulfate concentration enough to acquire radiopaque properties while maintaining the mechanical properties of the matrix. In this regard, mechanical and rheological properties were found similar to those of the polymer matrix, but radiopaque contrast tests revealed the infl uence of the nanoparticles concentration on the optical properties of the composites. The production of these nanocomposites suggests potential applications in the biomedical sector given their unique radioopacity properties.

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“…[1][2][3][4][5] The polyether soft segment of the low glass transition temperature (T g ) or low melting temperature (T m ) will endow the PEBA with the ductility or elasticity even at low temperature [6][7][8] ; the polyamide hard segment of high T m can ensure the mechanical strength and the physical cross-linking even at high temperature. [1][2][3][4][5] The polyether soft segment of the low glass transition temperature (T g ) or low melting temperature (T m ) will endow the PEBA with the ductility or elasticity even at low temperature [6][7][8] ; the polyamide hard segment of high T m can ensure the mechanical strength and the physical cross-linking even at high temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Polyamide-based poly(etherblock-amide) multiblock copolymers (PEBA) are a kind of the very important block copolymers due to the flexible molecular designability based on the various polyether and polyamide. [1][2][3][4][5] The polyether soft segment of the low glass transition temperature (T g ) or low melting temperature (T m ) will endow the PEBA with the ductility or elasticity even at low temperature [6][7][8] ; the polyamide hard segment of high T m can ensure the mechanical strength and the physical cross-linking even at high temperature. [9][10][11] Based on this, the PEBA has the potential application in such fields as clothing industry, membrane materials, and automobile industry.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of a high performance polyamide‐6 elastomer based on poly(ether‐block‐amide) multiblock copolymer by reactive processing in torque rheometer

Yuan

et al. 2017

Adv Polym Technol

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The polyamide-6 based poly(ether-block-amide) (PEBA) multiblock copolymers were reactively prepared in typical processing equipment, torque rheometer. The reactive processing conditions of PEBA were discussed in details on the base of the tensile strength as the main quantization parameter and the torque rheological curves.The optimized reaction temperature, reaction time, and rotational speed were 150°C, 10 min, and 40 rpm respectively. The chemical structure, tensile properties, thermal transition, thermal stability, water absorption, and solubility in organic solvents of PEBA prepared in optimized reaction conditions were characterized by Fourier transform infrared spectroscopy, tensile testing, differential scanning calorimetry, thermogravimetric analysis, and soaking testing in water and organic solvents. The tensile strength and elongation at break of PEBA are 35.9 MPa and 580% respectively. The glass transition temperature and melting temperature of soft segment of PEBA are −50 and 15°C, respectively; the glass transition temperature and melting temperature of hard segment of PEBA are 50 and 140°C respectively. Meanwhile, the PEBA has low water absorption, robust organic solvent resistance, and good thermal stability. The optimization process of PEBA will give the deep understanding of reactive processing of polymer materials. K E Y W O R D Scondition optimization, environmentally friendness, multiblock copolymer, reactive preparation, torque rheometer

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Radiopaque, barium sulfate‐filled biomedical compounds of a poly(ether‐block‐amide) copolymer

Cited by 12 publications

References 37 publications

Shape-Memory Properties of Radiopaque Micro-Composites from Amorphous Polyether Urethanes Designed for Medical Application

Shape-Memory Properties of Radiopaque Micro-Composites from Amorphous Polyether Urethanes Designed for Medical Application

Influence of X-ray opaque BaSO4 nanoparticles on the mechanical, thermal and rheological properties of polyoxymethylene nanocomposites

Synthesis and characterization of a high performance polyamide‐6 elastomer based on poly(ether‐block‐amide) multiblock copolymer by reactive processing in torque rheometer

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