Reyes Pablo, Edeleva Mariya, D'hooge Dagmar R, Cardon Ludwig, Cornillie Pieter
Laboratory of Morphology, Faculty of Veterinary Sciences, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
Centre for Polymer and Material Technologies (CPMT), Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark 130, Zwijnaarde, 9052 Ghent, Belgium.
Materials (Basel). 2021 Nov 17;14(22):6939. doi: 10.3390/ma14226939.
Polyacrylics have been considered for a broad range of material applications, including coatings, dental applications, and adhesives. In this experimental study, the casting potential of a group of (co)monomers belonging to the acrylic family has been explored to enable a more sustainable use of these polymer materials in the medical and veterinary science field. The individual contributions of each comonomer have been analyzed, the reaction conversion has been studied via gas chromatography (GC), the rheological behavior has been characterized via stress-controlled measurements, and the final mechanical properties have been obtained from tensile, flexure, and impact tests. The GC results allow assessing the pot life and thus the working window of the casting process. For the rheological measurements, which start from low-viscous mixtures, a novel protocol has been introduced to obtain accurate absolute data. The rheological data reflect the time dependencies of the GC data but facilitate a more direct link with the macroscopic material data. Specifically, the steep increase in the viscosity with increasing reaction time for the methyl methacrylate (MMA)/ethylene glycol dimethyl methacrylate (EGDMA) case (2% crosslinker) allows maximizing several mechanical properties: the tensile/flexure modulus, the tensile/flexure stress at break, and the impact strength. This opens the pathway to more dedicated chemistry design for corrosion casting and polyacrylic material design in general.
聚丙烯酸酯已被考虑用于广泛的材料应用，包括涂料、牙科应用和粘合剂。在这项实验研究中，研究了一组属于丙烯酸家族的（共）单体的浇铸潜力，以使这些聚合物材料在医学和兽医学领域得到更可持续的应用。分析了每种共聚单体的单独贡献，通过气相色谱（GC）研究了反应转化率，通过应力控制测量表征了流变行为，并通过拉伸、弯曲和冲击试验获得了最终的机械性能。GC结果有助于评估适用期，从而评估浇铸过程的工作窗口。对于从低粘度混合物开始的流变测量，引入了一种新的方案以获得准确的绝对数据。流变数据反映了GC数据的时间依赖性，但有助于与宏观材料数据建立更直接的联系。具体而言，对于甲基丙烯酸甲酯（MMA）/乙二醇二甲基丙烯酸酯（EGDMA）体系（2%交联剂），随着反应时间的增加粘度急剧上升，这使得几种机械性能最大化：拉伸/弯曲模量、断裂时的拉伸/弯曲应力和冲击强度。这为一般的腐蚀浇铸和聚丙烯酸材料设计开辟了更具针对性的化学设计途径。
