Adhesive Films Based on Benzoxazine Resins and the Photoreactive Epoxyacrylate Copolymer
UV-cross-linkable and thermally curable self-adhesive structural tapes (SATs) were compounded using solid commercial benzoxazine resins (Araldite MT 35700 and Araldite MT 35910) and a photoreactive epoxyacrylate copolymer (EAC). As initiators of benzoxazine resin polymerization and epoxy component c...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/5/1839 |
| _version_ | 1797474560448135168 |
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| author | Agnieszka Kowalczyk Marta Tokarczyk Mateusz Weisbrodt Konrad Gziut |
| author_facet | Agnieszka Kowalczyk Marta Tokarczyk Mateusz Weisbrodt Konrad Gziut |
| author_sort | Agnieszka Kowalczyk |
| collection | DOAJ |
| description | UV-cross-linkable and thermally curable self-adhesive structural tapes (SATs) were compounded using solid commercial benzoxazine resins (Araldite MT 35700 and Araldite MT 35910) and a photoreactive epoxyacrylate copolymer (EAC). As initiators of benzoxazine resin polymerization and epoxy component cationic polymerization, two kinds of latent curing agents (LCAs) were tested, i.e., amine type and ionic liquid type. The influence of the benzoxazine resin and the LCA type on the UV-cross-linking process, the self-adhesive features and thermal curing behavior of UV-cross-linked tapes, as well as the shear strength of cured aluminum/SAT/aluminum joints and thermal stability of adhesives were investigated. It was found that the amine additive and the benzoxazine resin take part in the UV-cross-linking process of the EAC as hydrogen donors, which is confirmed by an increase in cohesion (+86%) and a decrease in adhesion (−25%) of SATs. The highest results of adhesion to steel (47 N/25 mm) and overlap shear strength (11.1 MPa) values were registered for SATs based on Araldite MT 35910 and contained 7.5 wt. parts of the amine-type hardener. The formation of a polyacrylate-benzoxazine network has a significant impact on the course of the thermal curing process and the thermomechanical properties of adhesive joints, which was also confirmed by the Cure Index calculation. |
| first_indexed | 2024-03-09T20:31:52Z |
| format | Article |
| id | doaj.art-35ee9a0d4b6e475bbd278bd390d80bfc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T20:31:52Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-35ee9a0d4b6e475bbd278bd390d80bfc2023-11-23T23:19:40ZengMDPI AGMaterials1996-19442022-03-01155183910.3390/ma15051839Adhesive Films Based on Benzoxazine Resins and the Photoreactive Epoxyacrylate CopolymerAgnieszka Kowalczyk0Marta Tokarczyk1Mateusz Weisbrodt2Konrad Gziut3Department of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 70-322 Szczecin, PolandDepartment of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 70-322 Szczecin, PolandDepartment of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 70-322 Szczecin, PolandDepartment of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 70-322 Szczecin, PolandUV-cross-linkable and thermally curable self-adhesive structural tapes (SATs) were compounded using solid commercial benzoxazine resins (Araldite MT 35700 and Araldite MT 35910) and a photoreactive epoxyacrylate copolymer (EAC). As initiators of benzoxazine resin polymerization and epoxy component cationic polymerization, two kinds of latent curing agents (LCAs) were tested, i.e., amine type and ionic liquid type. The influence of the benzoxazine resin and the LCA type on the UV-cross-linking process, the self-adhesive features and thermal curing behavior of UV-cross-linked tapes, as well as the shear strength of cured aluminum/SAT/aluminum joints and thermal stability of adhesives were investigated. It was found that the amine additive and the benzoxazine resin take part in the UV-cross-linking process of the EAC as hydrogen donors, which is confirmed by an increase in cohesion (+86%) and a decrease in adhesion (−25%) of SATs. The highest results of adhesion to steel (47 N/25 mm) and overlap shear strength (11.1 MPa) values were registered for SATs based on Araldite MT 35910 and contained 7.5 wt. parts of the amine-type hardener. The formation of a polyacrylate-benzoxazine network has a significant impact on the course of the thermal curing process and the thermomechanical properties of adhesive joints, which was also confirmed by the Cure Index calculation.https://www.mdpi.com/1996-1944/15/5/1839benzoxazine resinsstructural adhesivesepoxyacrylate copolymerspolymer blendsUV-cross-linkingadhesion |
| spellingShingle | Agnieszka Kowalczyk Marta Tokarczyk Mateusz Weisbrodt Konrad Gziut Adhesive Films Based on Benzoxazine Resins and the Photoreactive Epoxyacrylate Copolymer Materials benzoxazine resins structural adhesives epoxyacrylate copolymers polymer blends UV-cross-linking adhesion |
| title | Adhesive Films Based on Benzoxazine Resins and the Photoreactive Epoxyacrylate Copolymer |
| title_full | Adhesive Films Based on Benzoxazine Resins and the Photoreactive Epoxyacrylate Copolymer |
| title_fullStr | Adhesive Films Based on Benzoxazine Resins and the Photoreactive Epoxyacrylate Copolymer |
| title_full_unstemmed | Adhesive Films Based on Benzoxazine Resins and the Photoreactive Epoxyacrylate Copolymer |
| title_short | Adhesive Films Based on Benzoxazine Resins and the Photoreactive Epoxyacrylate Copolymer |
| title_sort | adhesive films based on benzoxazine resins and the photoreactive epoxyacrylate copolymer |
| topic | benzoxazine resins structural adhesives epoxyacrylate copolymers polymer blends UV-cross-linking adhesion |
| url | https://www.mdpi.com/1996-1944/15/5/1839 |
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