Enhanced Crystallization Rate of Poly(L-lactide)/Hydroxyapatite-graft-poly(D-lactide) Composite with Different Processing Temperatures
Enhanced Crystallization Rate of Poly(L-lactide)/Hydroxyapatite-graft-poly(D-lactide) Composite with Different Processing Temperatures
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不同加工温度提高聚(L-丙交酯)/羟基磷灰石接枝-聚(D-丙交酯)复合材料的结晶速率
DOI：
10.1007/s10118-020-2374-1
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发表时间：
2019-12
影响因子：
4.3
通讯作者：
Zhen-Bo Ning
中科院分区：
文献类型：
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作者：
Min Wang;Lei-Chu You;Yu-Qi Guo;Ni Jiang;Zhi-Hua Gan;Zhen-Bo Ning
以羟基磷灰石（HA）为引发剂，辛酸亚锡（Sn（Oct）2）为催化剂，采用开环聚合法合成了羟基磷灰石接枝聚乳酸（HA-g-PDLA）。热重分析（TGA）和傅里叶变换红外光谱（FTIR）结果表明，PDLA链成功地通过共价键接枝到HA颗粒上。在两种不同的加工温度（190和230 °C）下，研究了接枝PDLA链对聚（L-丙交酯）/HA-g-PDLA（PLLA/HA-g-PDLA）复合材料结晶行为的影响，并与纯PLLA及其四种复合材料（PLLA/HA、PLLA/HA-g-PLLA、PLLA/PDLA和PLLA/HA/PDLA）进行了比较。与PLLA、PLLA/HA和PLLA/HA-g-PLLA复合材料相比，PLLA/HA-g-PDLA复合材料的结晶速率大大提高，其中没有立体复合物（SC）微晶。此外，当加工温度从190 °C升高到230 °C时，PLLA/HA-g-PDLA复合材料中PLLA结晶加速的影响不像其它含有SC微晶的复合材料如PLLA/HA/PDLA或PLLA/PDLA那样大。差示扫描量热法（DSC）结果表明，即使没有SC微晶，PLLA的结晶仍然可以加快了很多在该复合材料。这可能与PLLA/HA-g-PDLA复合材料中PDLA接枝链与无定形PLLA链之间的相互作用有关。等温结晶动力学研究表明，PLLA/HA-g-PDLA复合材料的成核和晶体生长本质更像是异相成核方式的三维晶体生长，不同于PLLA或其它复合材料。本研究为PLLA/HA复合材料的应用提供了新的思路。
Hydroxyapatite-graft-poly(D-lactide) (HA- g -PDLA) was synthesized by ring-opening polymerization with HA as initiator and stannous octanoate (Sn(Oct) 2 ) as catalyst. Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) results indicate that PDLA chains are successfully grafted onto HA particles by covalent bond. Under two different processing temperatures (190 and 230 °C), the effect of the grafted PDLA chains on the crystallization behavior of poly(L-lactide)/HA- g -PDLA (PLLA/HA- g -PDLA) composite was investigated in the current study, comparing to neat PLLA and its four composites (PLLA/HA, PLLA/HA- g -PLLA, PLLA/PDLA, and PLLA/HA/PDLA). The crystallization rate of PLLA/HA- g -PDLA composite is highly enhanced comparing to PLLA, PLLA/HA and PLLA/HA- g -PLLA composites in which there are no stereocomplex (SC) crystallites. In addition, when the processing temperature rises from 190 °C to 230 °C, the acceleration of PLLA crystallization in PLLA/HA- g -PDLA composite is not influenced so much as other composites containing SC crystallites, such as PLLA/HA/PDLA or PLLA/PDLA. The differential scanning calorimetry (DSC) results demonstrate that even without SC crystallites, the crystallization of PLLA can still be accelerated a lot in this composite. This may be related to the interaction between the grafted PDLA chains and the amorphous PLLA chains in PLLA/HA- g -PDLA composite. The isothermal crystallization kinetics studies indicate that the nature of nucleation and crystal growth of PLLA/HA- g -PDLA composite are more likely 3D crystalline growth with heterogeneous nucleation mode, which are different from PLLA or other composites. This investigation could shed new light on the application of PLLA/HA composites.
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DOI：
10.6028/jres.116.021
发表时间：
2011-09
影响因子：
1.5
作者：
Wang T;Chow LC;Frukhtbeyn SA;Ting AH;Dong Q;Yang M;Mitchell JW
通讯作者：
Mitchell JW
DOI：
10.1002/polb.24051
发表时间：
2016-08
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
Xiangyang Li;Yanping Liu;Xingyou Tian;Kunpeng Cui
通讯作者：
Xiangyang Li;Yanping Liu;Xingyou Tian;Kunpeng Cui
影响因子：
4.6
作者：
H. Tsuji;Hiroki Takai;S. Saha
通讯作者：
H. Tsuji;Hiroki Takai;S. Saha
影响因子：
8.6
作者：
Shaobing Zhou;Xiaotong Zheng;Xiongjun Yu;Jianxin Wang;J. Weng;Xiaohong Li;B. Feng;M. Yin
通讯作者：
Shaobing Zhou;Xiaotong Zheng;Xiongjun Yu;Jianxin Wang;J. Weng;Xiaohong Li;B. Feng;M. Yin
DOI：
10.1007/s11427-011-4155-0
发表时间：
2011-03
期刊：
Science China Life Sciences
影响因子：
--
作者：
Jia Li;W. Zheng;Yufeng Zheng;X. Lou
通讯作者：
Jia Li;W. Zheng;Yufeng Zheng;X. Lou