- Synthesis and properties of novel aromatic copolyamides containing phthalazinone moiety
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- 论文类型： 期刊论文
- 发表时间： 2006-06-01
- 发表刊物： JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
- 收录刊物： SCIE、EI、Scopus
- 卷号： 43
- 期号： 7
- 页面范围： 1043-1050
- ISSN号： 1060-1325
- 关键字： copolyamides; phthalazinone; solubility; thermal properties; tensile properties
- 摘要： A series of novel aromatic copolyamides were synthesized by the direct polycondensation of 2-(4-carboxyphenyl)-4-[4-(4-carboxyphenoxyl)phenyl]-phthalazinone (1), terephthalic acid (TPA), and four commercial diamines. The inherent viscosities of the polyamides were between 0.79 greater than or similar to 1.56 dL/g. Introduction of the non-coplanar phthalazinone segments into the main chains remarkably decreased the crystallinity and improved the solubility of the copolyamides. When the percentage of 1 in the diacid monomers was above 50%, the copolymers were soluble in aprotic polar solvents, such as N-methyl-pyrrolidinone and N,N-dimethylacetamide. The copolyamides showed high thermal properties associated with the glass transition temperatures in the range of 276 greater than or similar to 337 degrees C and 10% wt loss temperatures in nitrogen over 496 degrees C. Some polymer films cast from NMP solution had tensile strengths up to 123.4 MPa, initial moduli up to 2.10 GPa, and elongation at break values up to 9.6%.
