%0 Journal Article
%T High
%A Qingbao Guan
%A Theo J Dingemans
%A Xiangyu Bi
%A Yiheng Dai
%J High Performance Polymers
%@ 1361-6412
%D 2019
%R 10.1177/0954008318778897
%X We have synthesized and characterized a new family of nematic all-aromatic polyesteramide thermosets based on 6-hydroxy-2-naphthoic acid (HNA), terephthalic acid (TA), and 4-acetamidophenol (AAP). In order to incorporate a high concentration of the amide-based monomer (AAP), the melt transition (T K-N) and melt viscosity had to be lowered in order to maintain melt processable intermediates. Precursor thermoplastic reactive oligomers, end-capped with phenylethynyl functionalities, were prepared using standard melt condensation techniques with a target M n of 1000每9000 g molˋ1. The reactive oligomers with 20每30 mol% AAP could easily be processed into films, and the films exhibit good tensile properties in terms of tensile strength (70每80 MPa) and elongation at break (7每10%). A glass transition of 191∼C could be obtained when a 1000 g molˋ1 oligomer (HNA/TA/AAP(20)每1 K) was thermally cross-linked. When the AAP concentration reaches 35 mol%, the rigidity of the backbone and the hydrogen bonding interactions are enhanced, which make HNA/TA/AAP(35) polymers difficult to process
%K Polyesteramide
%K phenylethynyl
%K liquid crystal
%K high-performance polymer
%U https://journals.sagepub.com/doi/full/10.1177/0954008318778897