Mustafa Ersin Pekdemir, Ecem Özen Öner, Mediha Kök, Aybolek Cherkezova
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引用次数: 0
摘要
本研究旨在通过生产聚合物混合物为聚合物提供新的功能。以聚乳酸为主基体的两种重要生物聚合物与 PEG 聚合物按不同比例混合，通过溶液法制备出形状记忆（SM）聚乳酸-PEG 共混物。在聚合物共混物的 ATR-FTIR 光谱中观察到了聚乳酸特有的 -C = O 伸缩振动强信号。根据聚乳酸-聚乙二醇共混物的热通量随温度变化的测量结果，每种聚合物的特征峰都随着温度的升高而出现。这一结果表明聚合物混合物是不相溶的。聚乳酸-PEG 共混物的热稳定性是通过热重测量确定的，结果表明，随着 PEG 比率的增加，共混物的质量损失也在减少。由于 PEG 和聚乳酸都是双晶聚合物，因此在形状记忆聚合物混合物的 X 射线测量中发现了这两种聚合物的晶体结构。最后，研究发现所制得的聚乳酸-聚乙二醇混合物具有形状记忆特性，混合物可在短短 8 秒内恢复到原来的形状。
Thermo-responsive shape memory polymer blends based on polylactic acid and polyethylene glycol
In this study, it is aimed to provide new functions to polymers by producing polymer blends. Two important biopolymers, PLA as the main matrix and PEG polymers were mixed in different ratios to produce shape memory (SM) PLA-PEG blend by solution method. The characteristic -C = O stretching vibration of PLA was observed as a strong signal in the ATR-FTIR spectra of the polymer blends. According to the heat flux versus temperature measurement results of PLA-PEG blends, characteristic peaks of each polymer were observed with increasing temperature. This result indicates that the polymer blends are immiscible. The thermal stability of the PLA-PEG blend was determined by thermogravimetric measurements and it was observed that the mass loss in the blend decreased with increasing PEG ratio. Since PEG and PLA are bicrystalline polymers, crystal structures of both polymers were found in X-ray measurements in the shape memory polymer blends produced. Finally, it was found that the produced PLA-PEG blend showed shape memory property and the blend could return to its original shape in as short as 8 sec.
期刊介绍：
Original research on all aspects of polymer science, engineering and technology, including nanotechnology
Presents original research articles on all aspects of polymer science, engineering and technology
Coverage extends to such topics as nanotechnology, biotechnology and information technology
The English-language journal of the Polymer Society of Korea
Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.
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