Wrong resin

Rough wavy surface (applesauce) wrong resin/temperature too low or high. 

A mismatch between operator procedures and the automatic control system of the reactor (see also Table 17) was the first active failure identified in this scenario. This precursor was still present mainly due to a shortage of people. Literally it was said that the pressure relief valve would open if the wrong value was inserted into the reactor s control system. The second precursor was the failure of the pressure relief valve (see also Table 17), which was not known to the responsible person who decided to ignore the difference between procedures and control system. The pressure relief valve failed, because resins stuck in the valve after it was used for the first time. Consequently the second time the valve was opened it was at a much higher pressure due to the build up of resins in the valve. If this second precursor had not been observed in time by damp on the pipes situated above the pressure relief valve or by the alarms in the control room a possible accident scenario existed. This was especially dangerous as the alarms in the control room are often ignored because of the high incidence of false alarms (see also Table 17), which was the third precursor present. 

For a field of scientific and engineering endeavor, polymers have one of the more sloppy sets of nomenclature. Ask six people in the business to give you definitions of resins and plastics, and you ll get at least six different answers. Almost everyone will tell you that they re both polymers, and that s right. Some will tell you they re interchangeable. Strictly spealdng, they re wrong. 

Chemical attack Poor resin selection, wrong, or changed service conditions... 

The synthesis continues with repetition ofthese two steps until the peptide chain is complete. The peptide is cleaved from the resin, usually with HF in pyridine or CF3SO2OH in CF3CO2H and given a final purification from small amounts of peptides of the wrong sequence by chromatography, usually HPLC. 

In the melted state elementary sulfur is an excellent binder for aggregates such as sand, gravel, crushed stone, and similar materials. When a hot sulfur aggregate mixture is left to set, a material of concretelike hardness is obtained. This property leads to the term sulfur concrete or sulfur mortar, which is wrong strictly speaking, since the word concrete is used to refer to a product in which aggregates are bound with hydraulic products such as cement or with limestone. However, since polymer-bound aggregates recently developed to industrial maturity have been called polymer or synthetic resin concrete, the term sulfur concrete is maintained in this chapter. 

Wall thickness uniformity Incorrect mold rotation because of equipment problems or the wrong rotation ratio Variation in the thickness of the mold wall resulting in uneven heat transfer, thus improper melting and fusion rate of the resin Variation in heat transfer to the mold... 

There is no right or wrong here. It simply depends on the job the paint has to do, the drying facilities available, the requirements of the user and whether the difficulties mentioned are slight or severe with the particular resins suitable for the job. 

In his first paper Liebig showed that light oxygen ether contains a water-soluble liquid forming a resin with alkali. In his second paper he described the isolation of what he named aldehyde. He wrongly supposed that there is... 

Peptide synthesis resins are extremely fragile and the beads, if wrongly handled, can easily fracture, leading to the generation of fines which can block reaction vessel filter-frits and solvent lines. 

At the start of the synthesis, place caps over each well to avoid any spilt resin falling into the wrong reaction well. 

The blends described in the EDCPB provide a cross section of commercial alloys available in Asia, Europe, and North America. The focus is on blends with the five principal engineering resins polyamides, thermoplastic polyesters, polycarbonates, polyoxymethylenes (acetals), and polyphenylene ethers. There are but few examples of the commodity (and these mainly with polypropylene) as well as with high performance specialty resin blends. This may leave a wrong impression of the global blend industry. 

Resin smear can cause weak connections between plated-through-holes and innerlayer copper that fail under environmental stress. There is always some resin smear, which is removed by the desmear (etchback) process. If the desmear process is not effective, or if the resin smear is excessive, poor interconnection to the innerlayers can result. Possible causes of excessive smear are a dull drill or the wrong feed rate or drill speed, all of which can cause increased drill heating, resulting in more smear. 

The more smoke that rolls back, the less the chance the fire can be fought safely and effectively. The rollback is often hot enough to weaken roof strata and loosen resin-anchored bolts—conditions that make travel under such questionable if not wrong, particularly if the smoke limits visibility. The rollback not only contains heat and smoke, it contains fire gases that can act like a wick, bringing flame from the fire back into firefighters. 

---