Curing after

In order to study the cure behavior of the PTEB system, 1JC NMR of uncured and cured PTEB in the solid state was performed using crosspolarization magic-angle spinning techniques. The results show the polymerization to be via aromatization. The extent of cure versus cure temperature was determined quantitatively. It was found that the material was almost completely cured after one hour at 215°C. As the cure goes to completion, the ability to react decreases due to the corresponding rapid increase in Tg. Chemical shifts of the resonances in the cured material are consistent with a highly crosslinked condensed aromatic network. 

Appropriate amounts of x y resin and liquified amine were mixed together and evacuated at 60 c in a vacuum oven for t i minutes to remove air bubbles. The reaction mixture was poured into a hot (85°C) aluminum mold vhich was prepared in advance by lic tly spraying mold release agent (ISi 515, Green Chem. Products Inc.) to the inner surfaces of the mold. Samples were cured two hours at 85 C followed by two hours at 150 c (standsuxl cure). In some cases samples were subjected to eui alternate, high temperature cure of two hours at 85 C and two hours at 175 C (HT cure). After curing, samples were stored in a desiccator until use. 

PSA-type laminating adhesives can be cured prior to the lamination. The adhesive film is tacky as a typical PSA and produces good bonds. Another method involves lamination first and the cure after that. In this case the bond... 

Polyester Resin G A G P A A A A G Applied as the liquid monomer to magnesium powder and cured after incorporation of the other ingredients... 

PERMANENT-PRESS RESIN. A thermosetting resin used as a textile impregnate or fiber coating to impart crease resistance and permanent hot-creasing to suitings, dress fabrics, etc. Chemicals such as formaldehyde and maleic anhydride are the basis of these products. The resin is cured after the fabric has been tailored into a garment. A permanent-press fabric that requires no resin has been developed (a blend of polyester with cotton or rayon). 

To determine the wet bond strength coated panels were immersed in distilled water for 1500 h, removed and discs 25.4 mm in diameter stamped from them. The surfaces were wiped with a dry tissue and bonded between two cylindrical test pieces using a polyamide cured epoxide adhesive and immediately placed in a sealed container at 100% RH for the adhesive to cure. After 16 h the specimens were broken on an Instron Universal Test Machine with minimum delay. Recovered values were measured after the panels had dried out at room temperature and humidity for 7 days. Clearly, it is unlikely that the values reported represent the minimum bond strengths, as some drying out is almost inevitable, but the values are directly comparable. 

As clearly written in several chapters of this volume, the story of cisplatin is indeed a success story, given the numerous patients that have been completely cured after cisplatin (or carboplatin) treatment of cancer [1], This chapter will deal with a special aspect of platinum chemistry, namely its re-... 

Oil-soluble artemether and water-soluble sodium artesunate were developed and approved as new antimalarial drugs by the Chinese authorities in 1987. After 1992, dihydroartemisinin, Coartem (a combination of artemether and benflumetol), and Artekin (a combination of dihydroartemisinin and piperaquine) were also marketed as new antimalarial dmgs. Since then, over 10 million malaria patients on a global scale have been cured after administration of these drugs. As a result, artemether, artesunate, and Coartem were added by the World Health Organization to the ninth, eleventh, and twelfth Essential Medicine List respectively. 

The Freon TA Soxhlet extraction of the RTV silicone sample at different curing times with Freon reveals the degree of curing of the material. At time zero, when the RTV material was first coated for room temperature cure, almost 100% extractables were obtained (except residue of fillers). This 100% extractable indicates a 0% cure of the material. After 16 hrs. of room temperature cure at 50% relative humidity, most of the RTV material (>90%) was cured. After the second day, almost all of the RTVs studied were fully cured, and they seem to reach an extraction equilibrium. Further curing time shows no noticeable change in amount of extractables. For the fully cured RTV silicone, the level of extractables at their equilibrium extraction was a good indication of the unreactive cyclics present in this material. In Figure 5, the RTV silicone extractable is approximately 4%. 

As the VDP of polyimides involves two precursors, diamine and dianhydride, the relative amounts of fluxes of the precursor vapors need to be controlled carefully to obtain high quality polyimide thin films. The effects of both excess dianhydride as well as the diamine components have been studied and reported in literature, It was observed that, excess dianhydride (PMDA) undergoes desorption when cured after deposition leading to poor thermal stability. 

In 14 children, aged 1-15 years, with Microsporum canis tinea capitis given oral terbinafine for 4 weeks, the recommended daily dose produced no response by week 4 the dose was doubled (to 250 mg/day) for a further 4-8 weeks in six patients and continued at the original dose in six patients (66). Two patients withdrew. Four patients were cured after 8-12 weeks of treatment, and all had... 

The obtaining of the dithiol can be carried out either by basic hydrolysis (KOH/ EtOH or NHR2) but such a reaction lasts a long time, or by pyrolysis under vacuum at 120 °C (the problem of metals has been brou t up because of curing after drying if coagulation has been performed. In this case Al2(SO )3 is the best one). 

In the 1950s, an elastomer made from vinylidene chloride and called Saran was offered for a number of years as a vessel lining, but the author has not seen it for a decade and more. This material was cured after installation with ammonia. 

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