摘要
以偶联剂γ-(2,3-环氧丙氧)丙基三甲氧基硅烷(KH-560)处理后的超细滑石粉为增强相,聚乳酸(PLA)为基体,制备了超细滑石粉/PLA复合材料。通过傅里叶变换红外光谱(FT-IR)、电子扫描显微镜(SEM)、X射线衍射(XRD)、光学解偏振法、温度-形变曲线及热失重(TG)对复合材料进行了表征。结果表明,KH-560成功地包覆在滑石粉表面,滑石粉表面与PLA基体发生了化学键合,处理后的滑石粉粒子与PLA基体之间形成了良好的界面。适量的滑石粉能够提高PLA基体的结晶速率和结晶度,当滑石粉添加量增大到一定程度,PLA基体的晶格参数和晶体结构会发生变化。当滑石粉分散良好时,复合材料的玻璃化转变温度(Tg)和热稳定性显著提高。
The super fine talc powder/polylactide （PLA） composites were prepared. The super fine talc powder which modified by coupling agent KH-560 was employed as reinforcement; moreover, the PLA resin was employed as matrix. Fourier transform infrared （FF-IR）, scanning electron microscope （SEM） , X-ray diffraction （XRD） , optical depolarization, temperature-deformation curve, and thermal gravimetric analysis （TG） were employed to characterize the obtained composites. The results showed that, the KH-560 which coated on the surface of talc powder ensured the introduction of chemical bonding force between the sur- face of talc powder and the PLA matrix. Furthermore, there were good interface between the talc and the PLA matrix. The crystallization rate and the crystallinity of PLA matrix increased greatly, when the content of talc was appropriate. When the content of talc reached a required level, the lattice parameter and crystal structure of PLA matrix would change. When the talc had a good dispersion, the glass transition temperature （ Tg ） and the thermal stability of composites was markedly improved.
出处
《塑料工业》
CAS
CSCD
北大核心
2011年第12期76-79,共4页
China Plastics Industry
基金
江苏省科技支撑计划(工业)(BE2010176)
江苏省自然科学基金(BK2008195)
