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Shape memory properties of poly(D,L-lactide)/hydroxyapatite composites.

Xiaotong Zheng1, Shaobing Zhou, Xiaohong Li

  • 1School of Materials Science and Engineering, Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, PR China.

Biomaterials
|May 6, 2006
PubMed
Summary
This summary is machine-generated.

This study enhances the shape memory effect of Poly(D,L-lactide) (PDLLA) by compounding it with Hydroxyapatite (HA). The resulting PDLLA/HA composites show improved properties, indicating potential for biomedical applications.

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Area of Science:

  • Biomaterials Science
  • Polymer Science
  • Materials Engineering

Background:

  • Poly(D,L-lactide) (PDLLA) and Hydroxyapatite (HA) are biocompatible and biodegradable materials.
  • Shape memory polymers (SMPs) offer unique functional properties for advanced applications.

Purpose of the Study:

  • To prepare and characterize Poly(D,L-lactide)/Hydroxyapatite (PDLLA/HA) composites with enhanced shape memory properties.
  • To investigate the influence of HA content and sample thickness on the shape memory effect of PDLLA/HA composites.

Main Methods:

  • Preparation of PDLLA/HA composites with varying ratios and thicknesses.
  • Characterization using Scanning Electron Microscopy (SEM) for morphology.
  • Thermal analysis via Differential Scanning Calorimetry (DSC) to determine glass transition temperature (Tg).
  • Dynamic Mechanical Analysis (DMA) to evaluate dynamic mechanical properties and shape memory effect.

Main Results:

  • SEM revealed a well-dispersed morphology of HA grains within the PDLLA matrix.
  • PDLLA/HA composites exhibited a significantly improved shape memory effect compared to pure PDLLA.
  • The glass transition temperature (Tg) and dynamic mechanical properties were influenced by HA content.

Conclusions:

  • Hydroxyapatite incorporation effectively enhances the shape memory performance of PDLLA.
  • PDLLA/HA composites demonstrate promising potential for various biomedical applications due to their improved properties.