2026-10-11T08:11:19Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34037890 2026-10-01T03:04:42Z category_4 category_12 category_13 category_16 category_873 category_39 portal_63 item_type_6 month_year_10_2026

Reusing Chemically Recycled Cross-Linked Matrix from Succinic Acid–Epoxidized Linseed Oil Fakhri-Eddin Nadir Lahfaidh (25150969) Luc Vincent (1757413) Nicolas Sbirrazzuoli (1757428) Nathanael Guigo (1757425) Biochemistry Cell Biology Genetics Physiology Chemical Sciences not elsewhere classified Ecology solvolysis effectively allows increased network heterogeneity epoxidized linseed oil enhanced performance relative differential scanning calorimetry broader relaxation profile biobased thermoset recycling biobased succinic acid apparent curing behavior advanced kinetics studies thermoset resin circularity new starting materials named “ rec recycled polyacid fraction dynamic mechanical analysis valuable materials thermogravimetric analysis polyacid hardeners linked resin recycled product recycled formulation recycled compounds using spectroscopy transition temperature thermal properties tga ). sustainable approach solvolyzed products reducing waste reduced mobility recovered compounds molecular composition linked systems linked samples linked matrix higher glass heterogeneous nature findings demonstrate epoxy systems dsc ). chromatography techniques To address the challenges of thermoset resin circularity, the solvolyzed products from biobased succinic acid/epoxidized linseed oil (ELO) cross-linked resin were valorized into new starting materials for the preparation of recycled cross-linked systems. First, the recycled product was characterized by using spectroscopy and chromatography techniques (FT-IR and LC-MS), providing insights into their molecular composition. The recovered compounds were employed to synthesize new thermosetting resins, as polyacid hardeners for epoxy systems. The mechanical and thermal properties of the cross-linked samples were obtained by means of Dynamic Mechanical Analysis (DMA), tensile tests, and thermogravimetric analysis (TGA). The recycled formulation (named “Rec-ELO”) showed comparable or enhanced performance relative to similar fresh biobased resins. Notably, Rec-ELO displayed a higher glass-transition temperature and a broader relaxation profile, indicative of increased network heterogeneity. Advanced kinetics studies further highlighted differences in the apparent curing behavior between formulations from virgin and recycled compounds, as evidenced by Differential Scanning Calorimetry (DSC). These differences were attributed to lower reactive group concentration effects, reduced mobility, and the heterogeneous nature of the recycled polyacid fraction. These findings demonstrate that solvolysis effectively allows the recovery of valuable materials from biobased thermoset recycling, offering a sustainable approach to reducing waste and reliance on virgin resources. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/acsomega.6c04063.s001 https://figshare.com/articles/journal_contribution/Reusing_Chemically_Recycled_Cross-Linked_Matrix_from_Succinic_Acid_Epoxidized_Linseed_Oil/34037890 CC BY-NC 4.0