Morphology and mechanical properties of styrene-butadiene-styrene/poly(methyl methacrylate-co-n-butyl acrylate) interpenetrating polymer networks

Energetic hybrid polymer network (EHPN) through facile sequential polyurethane curation based on the reactivity differences between glycidyl azide polymer and hydroxyl terminated polybutadiene

“…Interpenetrating polymer networks (IPNs) based on HTPB PU/poly(methyl methacrylate), HTPB-PU/polystyrene and HTPB-PU/poly(ethylene oxide) have been investigated. [17][18][19][20][21] Many researchers have explored different approaches to improve the mechanical strength of GAP and HTPB, although they are signicantly restrained by the poor compatibility between GAP and HTPB due to the polar nature of GAP and non polar nature of HTPB. 22 Mathew et al reported the synthesis of GAP-HTPB cross-linked networks and achieved the mechanical strength of around 4.2 MPa and elongation <200% with 30% GAP-MDCI (methylene bis cyclohexyl isocyanate) with two glass transition temperatures at À74.03 C and À35.84 C. 23 Ding et al used a triazole curing system based on propargylterminated polybutadiene (PTPB) and GAP and reported a maximum mechanical strength of up to 2.5 MPa and elongation around 50% with (N 3 : C^C) molar ratios of 1 : 2.…”

Energetic interpenetrating polymer network based on orthogonal azido–alkyne click and polyurethane for potential solid propellant

“…HTPB-PU/Poly (methyl methacrylate) and HTPB-PU/Polystyrene, HTPB-PU/Poly (ethylene oxide) based IPNs have been examined. [35][36][37][38][39][40] Min et al investigated the block copolyurethane binder matrices of GAP/Polyethylene glycol and GAP/Polycaprolactone for better mechanical strength. 41 In the present research, we have developed an energetic IPN which is formed from the cross-linking of two binders system in which one binder (GAP) is highly energetic compared with the other (HTPB).…”

Covalent functionalization of multiwalled carbon nanotubes with polybutadiene

“…These incorporated epoxy groups along with the terminated hydroxyl groups will make them compatible with other bisphenol A and cycloaliphatic epoxies. On the other hand, HTPB can be used as starting material to prepare urethanes with excellent water resistance due to good reactivity of the hydroxyl end‐groups 33–40. Therefore, it is reasonable to regard the HTPB‐modified CNTs as a universal compatibilizer precursor in compatibilizing polymer and nanotubes in their composites, because the HTPB‐modified CNTs can be subsequently transformed to polymeric structures that are similar to the matrix polymers, and thus, improvement of bonding to matrix as well as a better dispersion of the CNTs could be observed.…”