| 1. |
- Höglund, Anders, et al.
(författare)
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Degradation profile of poly(epsilon-caprolactone) - the influence of macroscopic and macromolecular biomaterial design
- 2007
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Ingår i: Journal of macromolecular science. Pure and applied chemistry (Print). - : Informa UK Limited. - 1060-1325 .- 1520-5738. ; 44:7-9, s. 1041-1046
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Tidskriftsartikel (refereegranskat)abstract
- Macroscopic and macromolecular material design and their influence on hydrolysis mechanism of poly(epsilon-caprolactone) (PCL) was evaluated. Homogoenous discs of linear PCL, porous scaffolds of linear PCL and crosslinked PCL networks were subjected to hydrolytic degradation for up to 364 days in 37 degrees C and pH 7.4 phosphate buffer solution. After different hydrolysis times, mass loss and changes in molecular weight and thermal properties were determined in parallel to extraction and analysis of the formed degradation products. Size exclusion chromatography (SEC), differential scanning calorimetry (DSC) and gas chromatography-mass spectrometry (GC-MS) were used for the analyses. The results clearly demonstrated different degradation profiles and susceptibilities towards hydrolysis depending on the macroscopic and macromolecular biomaterial design.
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| 2. |
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| 3. |
- Karlsson, S., et al.
(författare)
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Degradation products in degradable polymers
- 1995
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Ingår i: Journal of macromolecular science. Pure and applied chemistry (Print). - 1060-1325 .- 1520-5738. ; A32:4, s. 599-605
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Tidskriftsartikel (refereegranskat)
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| 4. |
- Majdejabbari, Sara, et al.
(författare)
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Synthesis and Characterization of Biosuperabsorbent Based on Ovalbumin Protein
- 2010
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Ingår i: Journal of macromolecular science. Pure and applied chemistry (Print). - : Informa UK Limited. - 1060-1325 .- 1520-5738. ; 47:7, s. 708-715
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A biosuperabsorbent (Bio-SAP) hydrogel from ovalbumin (egg protein) was synthesized via modification with an acylating reagent and a bifunctional crosslinker, and its swelling behavior was investigated. The protein was acylated using ethylenediaminetetraacetic dianhydride (EDTAD), and then crosslinked by glutaraldehyde and dried. Bio-SAP provided through this method includes modification of lysyl residues in the unfolded protein by adding one or more hydrophilic carboxyl groups to increase the hydrophilicity of protein. The water binding capacity was measured in deionized water, 0.9% NaCl solution and synthetic urine, which under the best conditions were 296, 64 and 56 g/g after 24 h, respectively. In addition, the effects of EDTAD/protein ratio on the chemical modification of the protein, the various chemical neutralization agents, pH sensitivity and ionic strength, as well as temperature and particle size on the water absorption capacity with and without load and its kinetic were also investigated.
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| 5. |
- Nikjoo, Dariush, 1977-, et al.
(författare)
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Viscometric Analysis of Miscibility and Interactions for Binary, Ternary Polycarbonate/Brominated Polystyrene + Chloroform Systems at Different Temperatures
- 2013
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Ingår i: Journal of macromolecular science. Pure and applied chemistry (Print). - : Taylor & Francis. - 1060-1325 .- 1520-5738. ; 50:9, s. 1007-1011
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Tidskriftsartikel (refereegranskat)abstract
- Viscosities of ternary systems consist of polycarbonate (PC)/brominated polystyrene (PBrS) in chloroform and their corresponding binary systems were measured at different temperatures (20, 25, and 30°C). All the measurements were carried out at the concentration ranges of 0.1–0.6 g·dL−1. The mass ratio of PC to PBrS was selected as 75:25, 50:50, and 25:75 in the ternary solutions. Two empirical expressions of Huggins and Kraemer equations with three-parameters were used for reproducing of the experimental viscosity data. The fitting parameters were obtained for the corresponding temperatures. The miscibility criteria on the basis of the sign of Δ[η]m based on the difference between experimental and ideal values of [η]m, was calculated by applying the Garcia et al., theoretical equation. The effect of temperature on the viscosity data was also studied. The results from this method were correlated with the miscibility data obtained for the same system by differential scanning calorimeter (DSC) findings.
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