波兰波兹南大学Robert E. Przekop团队报道了基于有机硅成核剂的高冲击聚乳酸。相关研究成果于2024年3月7日发表在《中国高分子科学杂志》。

行业的各个部门都在寻找具有特定要求的新材料，以提高性能。

该研究提出了一种以聚乳酸为基础，用有机硅化合物（3-硫丙基）聚倍半硅氧烷（SSQ-SH）改性的新型复合材料。SSQ-SH化合物是笼状结构和非完全凝聚的随机结构的混合物。通过注射成型获得了复合材料。该研究包括对新材料的全面表征，分析其功能特性，如流变学（MFR）、机械强度（拉伸强度、夏比冲击强度）和热性能。还拍摄了SEM显微照片来分析样品的微观结构。

与纯聚合物相比，向聚乳酸中添加5%质量比的有机硅化合物导致MFR显著增加73.8%。5%SSQ-SH/PLA复合材料的冲击强度提高最大，与PLA相比增加了32.0kJ/m²，这意味着增加了187%。

该研究证实了通过使用有机硅化合物来改性聚合物性能的可能性。

附：英文原文

Title: High Impact Polylactide Based on Organosilicon Nucleation Agent

Author: Daria Pakua, Bogna Sztorch, Eliza Romańczuk-Ruszuk, Bogdan Marciniec, Robert E. Przekop

Issue&Volume: 2024-03-07

Abstract: Various sectors of the industry are searching for new materials with specific requirements, providing improved properties. The study presents novel composite materials based on polylactide that have been modified with the organosilicon compound, (3-thiopropyl)polysilsesquioxane (SSQ-SH). The SSQ-SH compound is a mixture of cage structures and not fully condensed random structures. The composite materials were obtained through injection moulding. The study includes a comprehensive characterization of the new materials that analyze their functional properties, such as rheology (MFR), mechanical strength (tensile strength, Charpy impact strength), and thermal properties. SEM microscopic photos were also taken to analyze the microstructure of the samples. The addition of a 5% by-weight organosilicon compound to polylactide resulted in a significant increase in MFR by 73.8% compared to the neat polymer. The greatest improvement in impact strength was achieved for the 5% SSQ-SH/PLA composite, increasing it by 32.0 kJ/m2 compared to PLA, which represents an increase of up to 187%. The conducted research confirms the possibility of modifying the properties of the polymer by employing organosilicon compounds.

DOI: 10.1007/s10118-024-3095-7

Source: https://www.cjps.org/en/article/doi/10.1007/s10118-024-3095-7/