Solidification behavior of PLLA/nHA nanocomposites
Source abstract
Abstract
As part of a broader effort to establish processing-structure-property relationships in PLLA/nHA, which is currently under consideration for bioresorbable scaffolds for bone repair, hot stage optical microscopy and differential scanning calorimetry have been used to investigate the solidification behavior of a series of medical grade PLLA/nHA nanocomposites. The presence of the nHA resulted in an increase in the number of spherulites per unit volume during isothermal crystallization, but there was a substantial decrease in the spherulite growth rate with increasing nHA content in the temperature range 100-130 °C, argued to be associated with a significant increase in the melt viscosity in the presence of the nHA. The consequences for the global solidification rates and the phase structure of the PLLA/nHA nanocomposites are discussed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Bone Tissue Engineering Materials · biodegradable polymer synthesis and properties · Orthopaedic implants and arthroplasty
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
Show source-provided references
1. Biodegradable and bioactive porous polymer/inorganic composite scaffolds for bone tissue engineering10.1016/j.biomaterials.2006.01.039 ↗
2. Bioinert, biodegradable, injectable polymeric matrix composites for hard tissue replacement: state of the art and recent developments10.1016/j.compscitech.2003.09.001 ↗
3. Biomaterial developments for bone tissue engineering10.1016/S0142-9612(00)00102-2 ↗
4. Bioresorbable composites prepared by supercritical fluid foaming10.1002/jbm.a.30385 ↗
5. Architecture and properties of anisotropic polymer composite scaffolds for bone tissue engineering10.1016/j.biomaterials.2005.07.015 ↗
6. Cellular composites based on continuous fibres and bioresorbable polymers10.1016/j.compositesa.2008.05.020 ↗
7. Cellular thermoplastic composites with microstructural gradients of fibres and porosity10.1016/j.compscitech.2007.08.028 ↗
8. Synthetic biodegradable polymers as orthopedic devices10.1016/S0142-9612(00)00101-0 ↗
9. Poly(lactic acid) fiber: an overview10.1016/j.progpolymsci.2007.01.005 ↗
10. Evaluation of hot-pressed hydroxyapatite/poly-L-lactide composite biomaterial characteristics10.1002/jbm.b.30093 ↗
11. Osteoinduction, osteoconduction and osseointegration
12. Bone structure: from angstroms to microns10.1096/fasebj.6.3.1740237 ↗
13. The material bone: structure–mechanical function relations10.1146/annurev.matsci.28.1.271 ↗
14. Crystal chemistry of bone mineral10.1152/physrev.1969.49.4.760 ↗
15. Development of nanocomposites for bone grafting10.1016/j.compscitech.2005.07.022 ↗
16. Enhanced functions of osteoblasts on nanophase ceramics10.1016/S0142-9612(00)00075-2 ↗
17. Biomedical nanocomposites of hydroxyapatite/polycaprolactone obtained by surfactant mediation10.1002/jbm.a.31247 ↗
18. Molecular conformation of poly(S-lactic acid)10.1002/bip.1968.360060305 ↗
19. Crystal structure, conformation, and morphology of solution-spun poly(L-lactide) fibers10.1021/ma00204a041 ↗
20. Epitaxial crystallization and crystalline polymorphism of polylactides10.1016/S0032-3861(00)00234-2 ↗
21. Crystal transformation and development of tensile properties upon drawing of poly(L-lactic acid) by solid-state coextrusion: effects of molecular weight10.1002/masy.200651015 ↗
22. The crystallization and melting processes of poly(L-lactic acid)10.1002/masy.200650223 ↗
23. Crystallization behavior of amorphous poly(L-lactide)10.1081/MB-120021612 ↗
24. Crystallization behavior of poly(L-lactic acid)10.1016/j.polymer.2006.08.054 ↗
25. Crystal modifications and thermal behavior of poly(L-lactic acid) revealed by infrared spectroscopy10.1021/ma051232r ↗
26. Polymorphous crystallization and multiple melting behavior of poly(L-lactide): molecular weight dependence10.1021/ma071258d ↗
27. Crystallization and solid-state structure of random polylactide copolymers: poly(L-lactide-co-D-lactide)s10.1021/ma001125r ↗
28. Effect of polylactide stereocomplex on the crystallization behavior of poly(L-lactic acid)10.1021/ma900004d ↗
29. A DSC study of the crystallization behaviour of polylactic acid and its nanocomposites10.1007/s10973-006-7717-9 ↗
30. Comparison between isothermal cold and melt crystallization of polylactide/clay nanocomposites10.1166/jnn.2008.021 ↗
31. Isothermal crystallization behavior of hybrid biocomposite consisting of regenerated cellulose fiber, clay, and poly(lactic acid)10.1002/app.26853 ↗
32. Heat capacity of poly(lactic acid)10.1016/j.jct.2004.05.003 ↗
33. Kinetics of phase change. I: general theory10.1063/1.1750380 ↗
34. Crystallization kinetics of poly(L-lactide)/carbonated hydroxyapatite nanocomposite microspheres10.1002/app.30527 ↗
35. Morphological changes during heating in poly(L-lactic acid)/poly(butylene succinate) blend systems as studied by synchrotron X-ray scattering10.1002/polb.10240 ↗
36. Rate of spherulitic crystallization with chain folds in polychlorotrifluoroethylene10.1063/1.1733363 ↗
37. Isothermal crystallization and chain mobility of poly(L-lactide)10.1002/(SICI)1097-4628(19970502)64:5<911::AID-APP11>3.0.CO;2-W ↗