| 模压挤出条件对聚(D,L-乳酸)及其复合材料力学性能的影响 |
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| 引用本文： | 刘芳,贾德民,吴小华,侯天伟,吴昌荣,游长江,王迎军. 模压挤出条件对聚(D,L-乳酸)及其复合材料力学性能的影响[J]. 生物医学工程学杂志, 2002, 19(4): 624-627 |
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| 作者姓名： | 刘芳 贾德民 吴小华 侯天伟 吴昌荣 游长江 王迎军 |
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| 作者单位： | 华南理工大学材料学院,广州,510640 |
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| 基金项目： | 国家自然科学基金重点资助项目 ( 5 9932 0 5 0 ) |
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| 摘 要： | 在辛酸亚锡的催化下由丙交酯开环聚合制备了聚（D，L）-乳酸（PDLLA），并用二苯基甲烷二异氰酸酯（MDI）作为扩链剂分别合成了MDI扩链聚（D，L）-乳酸（PDLLA/MDI）和MDI扩链聚（D，L）-乳酸/羟基磷灰石（PDLLA/HA/MDI）复合材料，采用自行设计的模压挤出设备着重研究了成型加工条件对这两类可生物降解材料力学性能的影响，实验结果表明，在最佳条件下PDLLA和PDLLA/MDI的弯曲强度分别为35.1MPa和51.3MPa，弯曲模量分别为2413.6MPa和1830.9MPa,PDLLA/HA和PDLLA/HA/MDI复合材料的弯曲强度分别为31.2MPa和55.4MPa。弯曲模量分别为1735.0MPa和2068.5MPa，可见，MDI扩链可显著提高PDLLA和PDLLA/HA复合材料的力学性能。
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| 关 键 词： | 力学性能 聚（D L－乳酸） 聚（D L－乳酸）／羟基磷灰石复合材料 模压挤出 生物降解材料 |
Effect of Moulding and Extruding Conditions on Mechanical Properties of Poly(D,L-lactide) and MDI Chain-extending Poly (D, L-lactide) / Hydroxyapatite Composite |
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| Liu Fang Jia Demin Wu Xiaohua Hou Tianwei Wu Changrong You Changjiang Wang Yingjun. Effect of Moulding and Extruding Conditions on Mechanical Properties of Poly(D,L-lactide) and MDI Chain-extending Poly (D, L-lactide) / Hydroxyapatite Composite[J]. Journal of biomedical engineering, 2002, 19(4): 624-627 |
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| Authors: | Liu Fang Jia Demin Wu Xiaohua Hou Tianwei Wu Changrong You Changjiang Wang Yingjun |
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| Affiliation: | Materials College, South China University of Technology, Guangzhou 510640. |
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| 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 2413.6MPa and 1830.9MPa, respectively. Bending strength of PDLLA/HA and PDLLA/HA/MDI is 31.2MPa and 55.4MPa,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. |
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| Keywords: | Poly(D L-lactide) Poly(D L-lactide)/hydroxyapatite composite Moulding and extruding |
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