Aluminium, equivalent weight

ROP [65, 74]. The indium alkoxide (11) was a good initiator, with 100 equivalents of SS-lactide being converted to PLA in 200 min, at 50°C. When compared with the analogous aluminium initiators, the indium complexes showed comparable rates but lower-molecular-weight PLA. All the PLA formed from rac-lactide was atactic [65]. 

A gram of aluminium yields 1271 cc. of hydrogen at 10° C. by interaction with hydrochloric acid. What is the equivalent and the atomic weight of aluminium ... 

Hydroxyl equivalent. The hydroxyl equivalent is the weight of epoxy resin containing one equivalent of hydroxyl group. It is important in calculating average molecular weights. It is determined by various methods (Lee and Nivelle, 1967), such as esterification with acids, reaction with lithium aluminium hydride, reaction with acetyl chloride and near-infra-red spectroscopy. 

In order to achieve weight savings in high-speed ferries, shipyards have turned to aluminium alloys of the 5000 and 6000 series. Experience has shown that weight savings in hull stmctures can also be as high as 40-50% compared to an equivalent hull stmcture made of steel. 

Power transmission. Given the respective electrical resistivities of aluminium and copper, for the same electrical resistance of a conductor or an equivalent drop in voltage, the 1370 conductor is half the weight of the copper conductor. 

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