Increased Hydrogen-bonding of Poly( m -phenylene isophthalamide) (PMIA) with Sulfonate Moiety for High-performance Easil
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ARTICLE
POLYMER SCIENCE
https://doi.org/10.1007/s10118-020-2416-8 Chinese J. Polym. Sci.
Increased Hydrogen-bonding of Poly(m-phenylene isophthalamide) (PMIA) with Sulfonate Moiety for High-performance Easily Dyeable Fiber Na Li, Xing-Ke Zhang, Jun-Rong Yu*, Yan Wang, Jing Zhu, and Zu-Ming Hu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
Abstract The demand for high thermal stability and high strength agents is growing steadily as a result of their increasing application in advanced materials. A series of sulfonated poly(m-phenyleneisophthalamide) (SPMIA) copolymers with superior thermal stability and good mechanical properties have been prepared via low temperature polycondensation method. Then the structures of SPMIA copolymers with different content quantities of 2,4-diaminobenzenesulfonic acid (2,4-DABSA) were confirmed by Fourier transform infrared (FTIR). Besides, their superior thermal properties were systematically investigated by differential scanning calorimetry (DSC), thermalgravimetreic analysis (TGA), and dynamic mechanical analysis (DMA). SPMIA fibers were obtained by wet spinning using the resultant SPMIA solutions. In addition, the obtained SPMIA fibers were proved to combine enhanced mechanical properties and unprecedented dyeability. Significantly, the SPMIA fiber with great mechanical property, thermal stability, and dyeability shows great potential in easily dyeing high-performance protective fibers. Keywords Sulfonated poly(m-phenyleneisophthalamide); Copolymer; Sulfonic acid group; High-Performance fiber; Easily dyeable fiber Citation: Li, N.; Zhang, X. K.; Yu, J. R.; Wang, Y.; Zhu, J.; Hu, Z. M. Increased hydrogen-bonding of poly(m-phenylene isophthalamide) (PMIA) with sulfonate moiety for high-performance easily dyeable fiber. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-020-2416-8
INTRODUCTION Poly(m-phenylene isophthalamide) (PMIA/meta-aramid) is one of the most promising high performance aromatic polyamides for commercial applications due to its flame resistance, excellent thermal stability, and low densities. Hence, their fibers have been widely explored, such as military heat-resistant protective clothing, manufacturing protective garments, and aerospace facilities.[1−5] However, the lack of functionalities has limited its wider applications. Furthermore, some performances of PMIA need to be further improved for expanding their future application; in particular, superior mechanical property and easily dyeable ability are essential factors for the application of PMIA in high-performance protective materials, specifically those related with apparels, carpets, etc. The traditional method for mechanical property modification utilizes the strong and stiff nanofillers reinforcement, like aramid nanofibers,[6] graphene oxide,[7−9] nano-SiO2,[10,11] multiwalled carbon nanotubes, and so on.[12,13] The weak interfacial interaction between nanofiller
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