{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T13:58:10Z","timestamp":1789826290469,"version":"4.0.1"},"reference-count":40,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2026,1,12]],"date-time":"2026-01-12T00:00:00Z","timestamp":1768176000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52073136"],"award-info":[{"award-number":["52073136"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Science and Technology Research Projects of Jiangxi Provincial Department of Education","award":["GJJ2203521"],"award-info":[{"award-number":["GJJ2203521"]}]},{"name":"Science and Technology Research Projects of Jiangxi Provincial Department of Education","award":["GJJ2511105"],"award-info":[{"award-number":["GJJ2511105"]}]},{"name":"Scientific Research Project of Nanchang Medical College","award":["NYXJ-2024-060"],"award-info":[{"award-number":["NYXJ-2024-060"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>A novel fluorinated diamine monomer, 4,4\u2032-((bicyclo[2.2.1]hept- 5-ene-2,3-diylbis (methylene)) bis(oxy))bis(3- (trifluoromethyl) aniline) (NFDA), featuring a tailored alicyclic norbornane core, flexible ether linkages, and pendant trifluoromethyl groups, was successfully synthesized. This monomer was polymerized with six commercial dianhydrides to produce a series of poly(amic acid) precursors, which were subsequently converted into high-performance polyimide (PI) films via a thermal imidization process. The strategic integration of the alicyclic, ether, and fluorinated motifs within the polymer backbone resulted in materials with an exceptional combination of properties. These PI films display outstanding solubility in a wide range of organic solvents, including low-boiling options like chloroform and tetrahydrofuran, highlighting their superior solution processability. The films are amorphous and exhibit remarkable hydrophobicity, evidenced by high water contact angles (up to 109.4\u00b0) and minimal water absorption (as low as 0.26%). Furthermore, they possess excellent optical transparency, with a maximum transmittance of 86.7% in the visible region. The materials also maintain robust thermal stability, with 5% mass loss temperatures exceeding 416 \u00b0C, and offer a desirable balance of mechanical strength and flexibility. This unique set of attributes, stemming from a rational molecular design, positions these polyimides as highly promising candidates for next-generation flexible electronics and advanced photovoltaics.<\/jats:p>","DOI":"10.3390\/polym18020207","type":"journal-article","created":{"date-parts":[[2026,1,12]],"date-time":"2026-01-12T14:57:25Z","timestamp":1768229845000},"page":"207","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Tailoring Properties Through Functionalized Alicyclic Diamine Towards Solution-Processable High-Performance Polyimide Films"],"prefix":"10.3390","volume":"18","author":[{"given":"Lei","family":"Xiong","sequence":"first","affiliation":[{"name":"School of Pharmacy, Nanchang Medical College, Nanchang 330052, China"},{"name":"School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Feiyan","family":"Ding","sequence":"additional","affiliation":[{"name":"School of Pharmacy, Nanchang Medical College, Nanchang 330052, China"},{"name":"School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liangrong","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Pharmacy, Fuzhou Medical College, Fuzhou 344000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinhai","family":"Wei","sequence":"additional","affiliation":[{"name":"School of Pharmacy, Nanchang Medical College, Nanchang 330052, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiayao","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Pharmacy, Nanchang Medical College, Nanchang 330052, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guanfa","family":"Xiao","sequence":"additional","affiliation":[{"name":"School of Pharmacy, Nanchang Medical College, Nanchang 330052, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenyu","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5817-2559","authenticated-orcid":false,"given":"Feng","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,1,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"110206","DOI":"10.1016\/j.eurpolymj.2020.110206","article-title":"Ultra-low dielectric constant polyimides: Combined efforts of fluorination and micro-branched crosslink structure","volume":"143","author":"Han","year":"2021","journal-title":"Eur. 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