Enhanced mechanical and wear performance of PS and HIPS composites by surface modification of hydroxyapatite via in situ polymerization and copolymerization
Enhanced mechanical and wear performance of PS and HIPS composites by surface modification of hydroxyapatite via in situ polymerization and copolymerization
复制标题
通过原位聚合和共聚对羟基磷灰石进行表面改性，增强 PS 和 HIPS 复合材料的机械和耐磨性能
DOI：
10.1163/156855407780452940
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发表时间：
2007-01
影响因子：
2.6
通讯作者：
中科院分区：
文献类型：
--
作者：
分别采用苯乙烯（St）原位聚合和乙烯基三乙氧基硅烷（VTES）与St原位共聚的方法对羟基磷灰石（HA）颗粒进行改性。将改性后的HA粒子与聚苯乙烯（PS）和高抗冲聚苯乙烯（HIPS）复合。研究了HA表面改性对PS/HA和HIPS/HA复合材料界面结合、增强、增韧和耐磨性能的影响。结果表明，在苯乙烯原位聚合过程中，PS大分子通过物理相互作用覆盖在HA表面，而在VTES与St原位共聚过程中，PS链则接枝在HA颗粒表面，原位聚合和共聚过程中HA表面PS链的重均分子量均超过30万。因此，通过物理作用包覆HA表面的PS链段和化学接枝在HA表面的PS链段增强了HA颗粒与PS、HIPS等聚合物基体的界面结合，提高了PS/HA和HIPS/HA复合材料的拉伸强度和冲击韧性。由于改性HA颗粒对HIPS和PS的增强增韧作用，使HIPS/HA和PS/HA复合材料的耐磨性得到提高。
Hydroxyapatite (HA) particles were modified by in situ polymerization of styrene (St) and in situ copolymerization of vinyltriethoxylsilane (VTES) and St, respectively. The modified HA particles were compounded with polystyrene (PS) and high impact polystyrene (HIPS). The effects of surface modifications of HA on interfacial adhesion, strengthening, toughening and wear- resistance of PS/HA and HIPS/HA composites were investigated. The results showed that the PS macromolecules covered the HA surface via physical interaction during in situ polymerization of styrene, whilst the PS chains were grafted on the surface of HA particles during in situ copolymerization of VTES and St. The weight-average molecular weights of PS chains on the HA surface during in situ polymerization and copolymerization exceeded 300,000. Therefore, the PS segments which covered via physical interaction, and those that were chemically grafted on, the HA surface enhanced the interfacial adhesion between HA particles and polymer matrix, such as PS and HIPS, and improved the tensile strength and impact toughness values of the PS/HA and HIPS/HA composites. As a consequence of the strengthening and toughening imparted by the modified HA particles to HIPS and PS, the abrasive wear resistance of the HIPS/HA and PS/HA composites was improved.
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影响因子：
4.6
作者：
Xiaolin Xie;Xiaolin Xie;R. Li;Qing-Xi Liu;Qing-Xi Liu;Y. Mai
通讯作者：
Xiaolin Xie;Xiaolin Xie;R. Li;Qing-Xi Liu;Qing-Xi Liu;Y. Mai
影响因子：
14
作者：
BONFIELD, W;GRYNPAS, MD;ABRAM, J
通讯作者：
ABRAM, J
影响因子：
14
作者：
X. Xie;C. Tang;K. Chan;X. C. Wu;C. Tsui;C. Y. Cheung
通讯作者：
X. Xie;C. Tang;K. Chan;X. C. Wu;C. Tsui;C. Y. Cheung
影响因子：
3
作者：
Xiaolin Xie;Bo-geng Li;Z. Pan;R. Li;S. Tjong
通讯作者：
Xiaolin Xie;Bo-geng Li;Z. Pan;R. Li;S. Tjong
DOI：
10.1016/s0168-583x(00)00650-9
发表时间：
2001-04
影响因子：
1.3
作者：
Ki-hwan Kim;J. Cho;D. Choi;S. Koh
通讯作者：
Ki-hwan Kim;J. Cho;D. Choi;S. Koh