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| Preparation and Properties of PPTA Chopped Fibers/Copolymerized Modified PPTA Precipitated Fibers Composite Paper |
| Received:July 23, 2023 Revised:September 22, 2023 |
| DOI：10.11981/j.issn.1000-6842.2024.03.96 |
| Key Words:PPTA;copolymerization modification;precipitation fibers;chopped fibers;composite paper |
| Fund Project:国家重点研发计划项目（2021YFB3700101）。 |
| Author Name | Affiliation | Postcode | | XIE Ping | College of Materials Science and Engineering， Donghua University， Shanghai， 201620
State Key Lab for Modification of Chemical Fibers and Polymer Materials， Donghua University， Shanghai， 201620 | 201620 | | ZHAO Kairong | Sinochem High Performance Fiber Materials Co.， Ltd.， Yangzhou， Jiangsu Province， 211417 | 211417 | | HU Zuming | College of Materials Science and Engineering， Donghua University， Shanghai， 201620
State Key Lab for Modification of Chemical Fibers and Polymer Materials， Donghua University， Shanghai， 201620 | 201620 | | YU Junrong | College of Materials Science and Engineering， Donghua University， Shanghai， 201620
State Key Lab for Modification of Chemical Fibers and Polymer Materials， Donghua University， Shanghai， 201620 | 201620 | | WANG Yan | College of Materials Science and Engineering， Donghua University， Shanghai， 201620
State Key Lab for Modification of Chemical Fibers and Polymer Materials， Donghua University， Shanghai， 201620 | 201620 | | LI Na* | College of Materials Science and Engineering， Donghua University， Shanghai， 201620
State Key Lab for Modification of Chemical Fibers and Polymer Materials， Donghua University， Shanghai， 201620 | 201620 |
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| Abstract: |
| M-phenylenediamine （MPD） with meta structure was introduced into the poly-p-phenylene terephthamide （PPTA） molecular chain via copolymerization strategy. The copolymerized modified PPTA （MPPTA） was prepared by low temperature solution copolymerization. Then MPPTA precipitated fibers （pMPPTA） were obtained by precipitation method. cPPTA/pMPPTA composite paper was prepared by combining pMPPTA with PPTA chopped fibers （cPPTA） via wet forming process. The effects of basis weight and pMPPTA dosage on the properties of cPPTA/pMPPTA composite paper were investigated. The results showed that basis weight and pMPPTA dosage had a significant influence on the microstructure of the composite paper. When the basis weight of cPPTA/pMPPTA composite paper was 90 g/m2 and the mass fraction of pMPPTA was 60%， the mechanical and dielectric properties of cPPTA/pMPPTA composite paper were significantly higher than those of PPTA original paper， and the tensile strength reached 32.27 MPa. |
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