Liquid polysulfide rubber (LP-3) was used as a toughening modifier to improve the toughness of polybenzoxazine obtained from bisphenol A-aniline based benzoxazine (B-a).The mixing and curing processes of B-a and LP-3 were monitored by 1H-NMR
FTIR and DSC.It was found that the ring-opening addition reaction between B-a and LP-3 happened during mixing
and the resultants showed lower curing temperature and faster curing rate than the pure B-a.The thermal and mechanical properties of the cured materials with various LP-3 incorporations were measured by TGA
DMA
impacting and flexural test.The results showed that LP-3 was an effective toughener for polybenzoxazine from B-a.Materials containing LP-3 in the crosslinked network showed much better toughness than that without LP-3.With the increase of LP-3 incorporation
impacting strength increased while modulus and glass transition temperature (Tg) decreased.When 5 wt% LP-3 was added
the impacting strength of the cured material was about 3.4 times higher than that of the polybenzoxazine from pure B-a.Simultaneously
the material at this LP-3 content retained high storage modulus (E'=3.9 GPa at 30℃) and high glass transition temperature (Tg=206℃) with improved flexural properties and thermal stability (T5%=322℃
T10%=342℃).It was concluded that LP-3 was a promising modifier for the commercial B-a resin even with small addition amount.When the amount of LP-3 was 5 wt%
the cured material owned the best overall performance.
Studies on Preparation and Properties of Bio-based Polymeric Monomers and Their Bio-based Polymers
Synthesis of the p-Propynyloxyphenyl-2-oxazoline(POPO) and Performance of Poly(benzoxazine/POPO)
Preparation, Processing and Thermal Properties of Naphthaleneethynyl-terminated Silica-containing Polyimides
Improving Hydrolysis Resistance of Poly(p-dioxanone) Fiber by Utilizing Cellulose Nanofibers
Synergistic Covalent-and-Supramolecular Polymers
Related Author
No data
Related Institution
Department of Polymeric Materials and Engineering, College of Materials and Metallurgy, Guizhou University
Dalian Institute of Chemical Physics, Chinese Academy of Sciences
The key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology
Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), School of Materials Science and Engineering, East China University of Science and Technology
(The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, State Key Laboratory of Polymer Materials Engineering, Sichuan University, )