Synthesis and AO Resistant Properties of Novel Polyimide Fibers Containing Phenylphosphine Oxide Groups in Main Chain
- 36 Downloads
A series of co-polyimide (PI) fibers containing phenylphosphine oxide (PPO) group were synthesized by incorporating the bis(4-aminophenoxy) phenyl phosphine oxide (DAPOPPO) monomer into the PI molecular chain followed by dry-jet wet spinning. The effects of DAPOPPO molar content on the atomic oxygen (AO) resistance of the fibers were investigated systematically. When the AO fluence increased from 0 atoms·cm−2 to 3.2 × 1020 atoms·cm−2, the mass loss of the fibers showed the dependence on DAPOPPO molar content in co-PI fibers. The PI fiber containing 40% DAPOPPO showed lower mass loss compared to those containing 0% and 20% DAPOPPO. At higher AO fluence, the higher DAPOPPO content gave rise to dense carpet-like surface of fibers. XPS results indicated that the passivated phosphate layer was deposited on the fiber surface when exposed to AO, which effectively prevented fiber from AO erosion. With the DAPOPPO content increasing from 0% to 40%, the retentions of tensile strength and initial modulus for the fibers exhibited obvious growth from 44% to 68%, and 59% to 70%, after AO exposure with the fluence of 3.2 × 1020 atoms·cm−2. The excellent AO resistance benefits the fibers for application in low Earth orbit as flexible construction components.
KeywordsPolyimide fibers Bis(4-aminophenoxy) phenyl phosphine oxide (DAPOPPO) Dry-jet wet spinning AO resistance
Unable to display preview. Download preview PDF.
This work was financially supported by the National Basic Research Program of China (973 Program, Key Project: No. 2014CB643604). We thank Beihang University for their help in AO experiment testing.
- 1.Fischer, H. R.; Tempelaars, K.; Kerpershoek, A.; Dingemans, T.; Iqbal, M.; Lonkhuyzen, H. V.; Iwanowsky, B.; Semprimoschnig, C. Development of flexible LEO-resistant PI films for space applications using a self-healing mechanism by surface-directed phase separation of block copolymers. ACS Appl. Mater. Interfaces 2010, 2, 2218–2225.CrossRefGoogle Scholar
- 5.Sukhanova, T. E.; Baklagina, Y. G.; Kudryavtsev, V. V.; Maricheva, T. A.; Lednický, F. Morphology, deformation and failure behaviour of homo- and copolyimide fibres: 1. Fibres from 4,4′-oxybis(phthalic anhydride) (DPhO) and p-phenylenediamine (PPh) or/and 2,5-bis(4-aminophenyl)-pyrimidine (2,5PRM). Polymer 1999, 40, 6265–6276.CrossRefGoogle Scholar
- 29.Ding, X.; Qiu, X.; Ma, X.; Li, G.; Gao, L. Preparations and properties of the phosphoruscontaining polyimide fibers. Chem. J. Chinese U. 2013, 11, 2650–2654.Google Scholar