Thiele Kerstin, Eversmann Nicole, Krombholz Andreas, Pufky-Heinrich Daniela
Fraunhofer Center for Chemical-Biotechnological Processes CBP, Gate 12, Building 1251, 06237 Leuna, Germany.
Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Walter-Hülse-Straße 1, 06120 Halle, Germany.
Polymers (Basel). 2019 Aug 28;11(9):1409. doi: 10.3390/polym11091409.
Structural properties of resins based on epoxidized linseed oil (ELO) were investigated in reference to varying amounts of the hardener components methyltetrahydrophthalic anhydride (MTHPA), pyromellitic dianhydride (PMDA) and maleic acid (MA). This includes gel time and the Shore A and D hardness. The shortest gel time of 0.9 min and the highest Shore A and D hardness of 85 and 34 were found at a n/n/n molar ratio of 8/1/8. To study the effect of the ELO mass on gel time and hardness, different masses of ELO (8, 10, 12, 14 and 16 g) were used, keeping the amount of the hardener system (4 g) (MTHPA, PMDA and MA) constant. With increased ELO mass, gel time increased while the Shore A and D hardness of the samples did not differ when up to 14 g ELO was applied. Substitution of petrol-based PMDA with biogenic compounds, specifically oxalic acid and citric acid, resulted in new bio-based epoxy resins with shorter gel times while maintaining hardness.
针对不同用量的固化剂组分甲基四氢邻苯二甲酸酐（MTHPA）、均苯四甲酸二酐（PMDA）和马来酸（MA），研究了基于环氧化亚麻籽油（ELO）的树脂的结构性能。这包括凝胶时间以及邵氏A硬度和邵氏D硬度。在n/n/n摩尔比为8/1/8时，发现最短凝胶时间为0.9分钟，最高邵氏A硬度和邵氏D硬度分别为85和34。为了研究ELO质量对凝胶时间和硬度的影响，使用了不同质量的ELO（8、10、12、14和16克），同时保持固化剂体系（4克）（MTHPA、PMDA和MA）的用量不变。随着ELO质量的增加，凝胶时间增加，而当使用量达到14克ELO时，样品的邵氏A硬度和邵氏D硬度没有差异。用生物源化合物，特别是草酸和柠檬酸替代石油基PMDA，得到了具有较短凝胶时间且保持硬度的新型生物基环氧树脂。
