Effect of moulding and extruding conditions on mechanical properties of poly(D,L-lactide) and MDI chain-extending poly(D,L-lactide)/hydroxyapatite composite.
- Author:
Fang LIU
1
;
Demin JIA
;
Xiaohua WU
;
Tianwei HOU
;
Changrong WU
;
Changjiang YOU
;
Yingjun WANG
Author Information
1. Materials College, South China University of Technology, Guangzhou 510640.
- Publication Type:Journal Article
- MeSH:
Biocompatible Materials;
chemistry;
Durapatite;
chemistry;
Mechanics;
Medical Laboratory Science;
instrumentation;
methods;
Polyesters;
chemistry
- From:
Journal of Biomedical Engineering
2002;19(4):624-627
- CountryChina
- Language:Chinese
-
Abstract:
In this paper, poly(D,L-lactide) (PDLLA), MDI chain-extending poly(D,L-lactide) (PDLLA/MDI) and MDI chain-extending poly(D,L-lactide)/hydroxyapatite composite (PDLLA/HA/MDI) were prepared respectively and the effects of moulding and extruding conditions on their mechanical properties were also investigated. At the optimal conditions, bending strength of PDLLA and PDLLA/MDI is 35.1 MPa and 51.3 MPa, respectively, and their bending modulus is 2413.6 MPa and 1830.9 MPa, respectively. Bending strength of PDLLA/HA and PDLLA/HA/MDI is 31.2 MPa and 55.4 MPa, respectively, and their bending modulus is 1735.0 MPa and 2068.5 MPa, respectively. These results have shown that the mechanical properties of PDLLA/MDI and PDLLA/HA/MDI have enhanced significantly by MDI chain-extending.
