Abstract
A process to produce fibers from Poly(m-phenyleneisophthalamide)(PMIA)solution in an ionic liquid via wet-spinning technology are described. The spinning processwas investigated on a small laboratory scale. Ionic liquid spinning solutions were firstprepared for PMIA fibers, followed by wet spinning. In the course of this research, thephysical properties of the PMIA fibers were estimated. We studied the dependence of themechanical properties of the obtained PMIA fibers on the composition of the coagulationbath, and on the choice of solvent in spinning solution. The morphology of the fibers fromionic liquid and traditional DMAc solvents via wet-spinning process were observed byscanning electrical microscopy(SEM). The differences of morphologies and properties ofthe PMIA fibers obtained from two different solvents are discussed.
Highlights
Poly(m-phenyleneisophthalamide)(PMIA) is well know as fire resistant material
We have investigated the dissolution and wet-spinning formation of PMIA fiber in and from ionic liquids
The spinning solution manifested good properties; filtration, for example, proceeded smoothly at a pressure of about 0.3 - 0.5 MPa. In this phase of the research, the effects of the composition of the spinning bath, the composition of coagulation bath and the temperature of coagulation bath upon the mechanical properties of the formed PMIA fibers were presented in Table 1, 2 and 3
Summary
Poly(m-phenyleneisophthalamide)(PMIA) is well know as fire resistant material. It is a kind of high-crystallinity fibrous polymers and neither soluble nor fusible because of the high rigidity and conjugation of its backbone which cause difficulty to process. PMIA has poor solubility in organic solvents such as dimethylformamide(DMF) and dimethylacetamide(DMAc) [1,2,3].
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