| 单词 |
precure |
| 释义 |
preˈcure, v.
[pre- A. 1.]
intr. Of a synthetic resin: to cure prematurely, making mechanical processing impossible. So ˈprecure n., the premature curing of a synthetic resin; preˈcuring vbl. n.
1935C. Ellis Chem. Synthetic Resins I. xxviii. 612 Avoidance of precuring during drying is essential if the molding properties of the resin are to remain unimpaired. 1936H. W. Rowell Technol. Plastics xxiii. 170 Another form of pre-cure is due to mixing a batch of quick curing powder or already cured powder with one having a normal rate of cure. 1943Brit. Plastics XV. 235/2 Precuring..shows up on the underside of the moulding as a slight chalkiness, in which the outlines of individual moulding powder particles can be seen. 1952J. Delmonte Plastics Molding viii. 208 If preheating is carried much beyond this temperature, it [sc. a thermosetting resin] will begin to precure excessively and will lose its flow qualities. 1962J. T. Marsh Self-Smoothing Fabrics xi. 172 Where the material is batched or plaited in a warm condition immediately after the stenter, there are dangers of what has been termed ‘pre-cure’ which it is essential to avoid where mechanical processing takes place before the final condensation, and which it may possibly be wise to avoid generally. |
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单词 precuneus 释义 precuneus, pr- Anat.|prkjunis|[f. L. pr pre- B. 3 + cuneus: see cuneat......