Preparation and characterization of biodegradable condensation polyimide

• Main Authors: Wei-Ming Wang, 王偉明
• Other Authors: Rong-Hsien Lin
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/32523320540672261689

碩士 === 國立高雄應用科技大學 === 化學工程系碩士班 === 96 === Biodegradable oligomer, amine terminated poly(propylene fum- arate)(PPF-NH2), was successfully synthesized from poly(propylene fumarate) oligomer (PPF) and 3-chloropropylamine hydrochloride. PPF -NH2 was successfully used to react with 3,3’,4,4’-biphenyl tetracarboxylic dianhydride (s-BPDA) in the solvent to generate biodegradable poly(amic acid) (bio-PAA) via condensation reaction. A final product of biodegr- adable polyimide (bio-PI) was obtained by immidization of bio-PAA at the low temperature (120 oC) under the vacuum condition. Amount of biodegr- adable segment (PPF-NH2) in the bio-PI can be arranged to synthesize the random type of bio-PI by replacing some PPF-NH2 with 4,4’-oxydianiline (4,4’-ODA). The synthesized PPF, PPF-NH2, bio-PAA, and bio-PI were charac- terized by FTIR, 1H-NMR, and GPC. The degradation characterization of various bio-PI films was performed at phosphate buffer solution. The morphologies of various bio-PI films and their degraded materials were observed by Scanning Electron Microscopy (SEM). The thermal and mechanical properties of the Bio-PI’s were measured by the TGA and DMA, respectively. The weight loss and degraded surface of the bio-PI films were very apparent after buffer solution test. The bio-PI film synthesized from PPF-NH2 and s-BPDA was degraded more quickly than the random type of bio-PI film incorporated with 4,4’-ODA. The degree of degradation for various bio-PI film increases with increasing the degradation time. The thermal properties of bio-PI is a little worse than these of PI; but it is still comparable to these of PI. The thermal properties of bio-PI is enhanced by replacement of PPF-NH2 with 4,4’-ODA. The mechanical property of bio-PI is a little worse than PI, but it’s still in the same magnitude order.