ISOTHERMAL CRYSTALLIZATION BEHAVIOR AND UNIQUE BANDED SPHERULITES OF HYDROXYAPATITE/POLY(L-LACTIDE) NANOCOMPOSITES  

作　　者：陈学思 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences [2]Graduate School of Chinese Academy of Sciences

出　　处：《Chinese Journal of Polymer Science》2010年第4期499-507,共9页高分子科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Key Project No.50733003 and Project No.20604030);the International Cooperation fund of Science and Technology(Key project 20071314) from the Ministry of Science and Technology of China;the fund from Chinese Academy of Sciences(KGCX-YW-208)

摘　　要：Hydroxyapatite/poly（L-lactide） （HA/PLLA） nanocomposites were prepared by the solvent mixing method. The isothermal crystallization behavior was studied by differential scanning calorimetry （DSC） and polarized optical microscopy （POM）. The results show that the crystallization behavior of HA/PLLA composites was strongly affected by the content of HA and crystallization temperature, and the addition of HA could promote nucleation and enhance the crystallization rate. When isothermal crystallization was carried out at 110℃, the HA/PLLA nanocomposite with 1% HA content crystallized most rapidly among all the composites and the half crystallization time was only 1.0 min. Banded spherulites were observed for the HA/PLLA composites, but no banded spherulites were seen in the crystals of PLLA under the same condition.Hydroxyapatite/poly（L-lactide） （HA/PLLA） nanocomposites were prepared by the solvent mixing method. The isothermal crystallization behavior was studied by differential scanning calorimetry （DSC） and polarized optical microscopy （POM）. The results show that the crystallization behavior of HA/PLLA composites was strongly affected by the content of HA and crystallization temperature, and the addition of HA could promote nucleation and enhance the crystallization rate. When isothermal crystallization was carried out at 110℃, the HA/PLLA nanocomposite with 1% HA content crystallized most rapidly among all the composites and the half crystallization time was only 1.0 min. Banded spherulites were observed for the HA/PLLA composites, but no banded spherulites were seen in the crystals of PLLA under the same condition.

关 键 词：HYDROXYAPATITE POLYLACTIDE Crystallization NANOCOMPOSITES SPHERULITES 

分 类 号：TB383.1[一般工业技术—材料科学与工程]