High-performance resins

Improved versions of the high performance resin systems continue to be developed (53). Toughening of epoxies has emerged as an important area for investigation using both mbber and thermoplastics (54—56). 

Depending on the characteristics and performance requirements, adhesives systems are frequendy modified with diluents (reactive and nonreactive) and polyfunctional high performance resins, as weU as with fillers of various types. 

High performance polyethylene fibers (HPPE), 13 382-383 High performance resin systems,... 

This problem was solved by the introduction of a new improved resin. This major innovation in the UPR industry came after the introduction of isophthalic acid, and especially the pioneer work of its incorporation into UPRs by the Amoco Chemical group. This very significant and extremely logic development led to the so-called high-performance resins. 

Application High-performance resins suitable for injection molding Compatibifizing... 

Observations The current application has synthesized high-performance resins having... 

High-performance resins were prepared by Kanada et al. (2) containing the crosslinking co-reagent, 4-naphthoquinonediazidesulfonate, (I). 

Pretzer et al. (4) prepared high-performance resins consisting of trimellitic anhydride imide esters derived from ethanol amine, ethylene glycol, and pyromellitic dianhydride that were used in applications requiring good mechanical properties and heat and fire resistance. 

Nonconjugated polyazomethines, ( ), were prepared by Udea et al. (2) and then converted into polybenzoxazoles by heating from 250 to 400°C for 25 minutes as illustrated in Eq. (1). Polybenzoxazoles were effective as high-performance resins. 

The great value of the unique characteristics of fluorinated polymers in the development of modern industries has ensured an increasing technological interest since the discovery of the first fluoropolymer, poly(chlorotrifluoro-ethylene) in 1934. Hence, their fields of applications are numerous paints and coatings [10] (for metals [11], wood and leather [12], stone and optical fibers [13, 14]), textile finishings [15], novel elastomers [5, 6, 8], high performance resins, membranes [16, 17], functional materials (for photoresists and optical fibers), biomaterials [18], and thermostable polymers for aerospace. 

Advanced composites is a term that has come to describe materials that are used for the most demanding applications, such as aircraft, having properties considerably superior to those of conventional composites and much like metals. These materials are engineered from high-performance resins and fibers. The construction and orientation of the fibers are predetermined to meet specific design requirements. Advanced composite structures are usually manufactured in specific shapes. An advanced composite can be tailored so that the directional dependence of strength and stiffness matches that of the loading environment. 

Poly(l,3-cyclohexadiene-co-styrene) having a M of 63,603 daltons and containing up to 86% 1,3-cyclohexadiene has been anionically prepared using l,3-bis(l-lithio-l,3,3-trimethyl-butyl)benzene as catalyst. When hydrogenated, the material is converted into a high-performance resin. 

Bicyclic conjugated diene polymers were anionically prepared by Watanabe [ 1 ] using bicyclo[4.3.0]-2,9-nonadiene and bicyclo[4.3.0]-l,8-nonadiene and products used in high-performance resins. The polymer product of dicyclopenta-diene and 1,3-cyclohexadiene was also prepared by Oshima [2] and used in optical applications. 

Lazear, N. R. Polycarbonate High Performance Resin. Advanced Materials Processes (February 1995) 43 45. 

High-performance resins can act as supports for specialized functional groups. For example, the separation of isoenzymes by affinity chromatography was accomplished on silica Glycophase to which adenosine monophosphate had been coupled (Ohlson et a/., 1978). The same investigators prepared specific immunoabsorbents by coupling antiserum to the Glycophase. 

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