Results 251 to 260 of about 38,523 (307)
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Experientia, 1973
Thermal polymerization of aspartic acid produces a polysuccinimide (I), a chain of aspartoyl residues. An investigation was made of the alkaline hydrolysis of the imide rings of (I) which converts the polyimide to a polypeptide. The alkaline hydrolysis of polyimides can be expected to be kinetically complex due to increasing negative charge generated ...
P D, Hoagland, S W, Fox
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Thermal polymerization of aspartic acid produces a polysuccinimide (I), a chain of aspartoyl residues. An investigation was made of the alkaline hydrolysis of the imide rings of (I) which converts the polyimide to a polypeptide. The alkaline hydrolysis of polyimides can be expected to be kinetically complex due to increasing negative charge generated ...
P D, Hoagland, S W, Fox
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Adhesion of polyimide to silicon and polyimide
Journal of Applied Polymer Science, 1993AbstractThe characteristics of the adhesions of polyimide to silicon and to polyimide and the autohesion of a polyimide blend have been investigated. As found, the peel strength of pyromellitic dianhydride–4,4′‐oxydianiline (PMDA–ODA) on silicon can be greatly improved by blending with 20 or 40% benzophenone tetracarboxylic dianhydride–p‐phenylene ...
Jwo‐Huei Jou +3 more
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Journal of Polymer Science Part C: Polymer Symposia, 1967
AbstractThe preparation and properties of aliphatic and aromatic polyimides are reviewed. The discussion includes a comparison of methods of synthesis of the aliphatic vs. aromatic polymers and a detailed consideration of chemical structure vs. properties.
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AbstractThe preparation and properties of aliphatic and aromatic polyimides are reviewed. The discussion includes a comparison of methods of synthesis of the aliphatic vs. aromatic polymers and a detailed consideration of chemical structure vs. properties.
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LC‐polyimides, 32. Characterization of the Mitsui‐Toatsu LC‐polyimide and related polyimides
Macromolecular Chemistry and Physics, 1997AbstractTwo polyimides were prepared from 1,3‐bis[4′‐(4″‐aminophenoxy)cumyl]benzene and 1,2:4,5‐benzenetetracarboxylic dianhydride (PMDA) or 1,8:4,5‐naphthalenetetracarboxylic dianhydride. A poly(amide‐imide) was prepared from the same diamine and trimellitic anhydride.
Gert Schwarz +5 more
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Proceedings of the 12th International Conference on Biomedical Engineering and Technology, 2022
Xuenan Sun +3 more
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Xuenan Sun +3 more
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Low temperature polyimide-to-polyimide direct bonding
2019 6th International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D), 2019In this study, two polyimide (PI) films were bonded at 250/300 °C for 60 min. A good bonding interface with few voids was observed. During the bonding process, the partial cured PI film still underwent cross-linking reaction, resulting the voids in bonding sample..
Hong-Che Liu, Chih Chen
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Biocompatibility of fluorinated polyimide
Journal of Biomedical Materials Research, 2002AbstractContact between blood and biomaterial triggers a complex series of events including protein adsorption, leukocyte adhesion and activation, and complement activation. In this article, a series of fluorinated polyimides cured at a different temperatures was prepared, and the biocompatibility of the membranes was evaluated using in vitro protein ...
M, Kanno +3 more
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High-Resolution Profiling of the Polyimide−Polyimide Interface
Macromolecules, 1996Dynamic secondary ion mass spectrometry (SIMS), nuclear reaction analysis, and neutron reflectometry were used to profile polyimide−polyimide interfaces. For interfaces between two layers of poly(4,4‘-oxydiphenylene−pyromellitimide) (PMDA−ODA) polyimide it was determined that the interfacial fracture energy Gc and the interfacial width depended ...
Nancy C. Stoffel +7 more
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MRS Proceedings, 1996
AbstractWe have explored polyimide foams created using a block copolymer approach as part of our research efforts to obtain thin film dielectric layers with very low dielectric constants for use in microelectronic devices. In these systems the pore sizes are in the nanometer range thus the term “nanofoam”, The polyimide foams are prepared from phase ...
K. R. Carter +5 more
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AbstractWe have explored polyimide foams created using a block copolymer approach as part of our research efforts to obtain thin film dielectric layers with very low dielectric constants for use in microelectronic devices. In these systems the pore sizes are in the nanometer range thus the term “nanofoam”, The polyimide foams are prepared from phase ...
K. R. Carter +5 more
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Vapor Deposition of Polyimide and Polyimide Precursors on Copper
1990Abstract : In this article we describe experiments in which ultra-thin films of polyimide were formed on polycrystalline and (111) single crystal copper substrates following heating of a vapor deposited layer of polyamic acid produced by codeposition of 4,4'-diaminodiphenyl ether (ODA) and 1,2,4,5- benzenetetracarboxylic dianhydride (PMDA).
W. N. Unertl +4 more
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