Mechanical and Thermal Properties of Polylactide (PLA) Composites Modified with Mg, Fe, and Polyethylene (PE) Additives.
Mechanical and Thermal Properties of Polylactide (PLA) Composites Modified with Mg, Fe, and Polyethylene (PE) Additives.
复制标题
用镁、铁和聚乙烯（PE）添加剂改性的聚乳酸（PLA）复合材料的机械性能和热性能
DOI：
10.3390/polym12122939
复制
发表时间：
2020-12-09
期刊：
影响因子：
5
通讯作者：
Osiecki T
中科院分区：
文献类型：
--
作者：
Oksiuta Z;Jalbrzykowski M;Mystkowska J;Romanczuk E;Osiecki T
本文采用挤出成型法制备了聚乙烯、铁粉和镁粉各占5%的聚乳酸基复合材料，并在10 MPa左右的压力下进行了压缩成型，对其进行了表征。这些复合材料进行了机械，热，和形态学评价。结果表明，与纯聚乳酸（PLA）相比，加入铁粉后复合材料的拉伸强度（σ和YS 0.2）有所提高，而加入镁粉后复合材料的延展性略有提高（从2.0%提高到2.5%）。这些复合材料在0.9%盐水溶液中180天的降解研究显示，所有样品的溶液pH值均从酸性变为碱性。在PLA-5%Mg样品的情况下观察到变化最大的质量损失，其中最初样品质量增加（前30天）然后减少，并且在120天之后，质量再次增加。在降解现象的测试材料的背景下，结果表明，最稳定的是与Fe添加的PLA复合材料（PLA-5%Fe），具有最高的拉伸强度和硬度。
In this article, polylactic acid-based composites reinforced with 5% of polyethylene, iron, and magnesium powders were prepared by extrusion and compressed under the pressure of about 10 MPa and characterized. These composites were mechanically, thermally, and morphologically evaluated. It was found, compared to the pure polylactic acid (PLA), an improvement in tensile strength (both σ and YS0.2) was obtained for the composite with the iron powder addition, while the magnesium powder slightly improved the ductility of the composite material (from 2.0 to 2.5%). Degradation studies of these composites in the 0.9% saline solution over a period of 180 days revealed changes in the pH of the solution from acidic to alkaline, in all samples. The most varied mass loss was observed in the case of the PLA-5%Mg sample, where initially the sample mass increased (first 30 days) then decreased, and after 120 days, the mass increased again. In the context of degradation phenomenon of the tested materials, it turns out that the most stable is the PLA composite with the Fe addition (PLA-5%Fe), with highest tensile strength and hardness.
登录
查看更多内容
影响因子：
3.1
作者：
Djellali, Souad;Haddaoui, Nacereddine;Grohens, Yves
通讯作者：
Grohens, Yves
影响因子：
15.1
作者：
Qin, Lijun;Qiu, Jianhui;Fu, Xie
通讯作者：
Fu, Xie
影响因子：
5
作者：
Lysik, Dawid;Mystkowska, Joanna;Bucki, Robert
通讯作者：
Bucki, Robert
影响因子：
3.2
作者：
Liang, Hongyu;Hao, Yanping;Zhang, Huixuan
通讯作者：
Zhang, Huixuan
影响因子：
14
作者：
Renouf-Glauser, AC;Rose, J;Cameron, RE
通讯作者：
Cameron, RE