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- W2389741666 abstract "Modified PPTA was prepared by low-temperature solution polycondensation using pphenylenediamine(PPD),terephthaloyl chloride(TPC)and 2-chloro-p-phenylenediamine(the third monomer)in the solvent system N-Methyl pyrrolidone/Lithium Chloride(NMP/LiCl).The influence of third monomer content on the polymer'sηinhwas investigated and the synthetic aromatic polyamides were characterized by XRD,TG and SEM.The results indicated that the crystallization degree and thermal properties of the modified polymer decrease slightly compared with the PPTA,but it is still a promising resin with good stability.It was found that when the third monomer content was 45mol%the film possesses the best mechanical properties,which is much higher than pure PPTA film formed by the same method.With the increasing content of 2-chloro-p-phenylenediamine,the fracture toughness of the film increases,and the breaking elongation rate of the film is also gradually improved." @default.
- W2389741666 created "2016-06-24" @default.
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- W2389741666 date "2014-01-01" @default.
- W2389741666 modified "2023-09-24" @default.
- W2389741666 title "Synthesis and Characterization of Modified PPTA by 2-chloro-p-phenylenediamine" @default.
- W2389741666 hasPublicationYear "2014" @default.
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