释义 |
undercure, v. (stress variable) [under-1 10.] trans. To cure (plastic or rubber) for less than the optimal period.
1916[see overcure v.]. 1965Encycl. Polymer Sci. & Technol. II. 53 To increase the bending capacity still more, the laminated sheets are usually slightly under⁓cured. So ˈundercured ppl. a., underˈcuring vbl. n. Also ˈundercure n., the process or result of undercuring.
1912Jrnl. Soc. Chem. Industry 16 Dec. 1100/1 Nos. (1) and (2) [sc. specimens of rubber] were distinctly under⁓cured at 35 lb. 1915Ibid. 15 Oct. 990/2 In the case of undercures the curve often breaks off too soon for this to be apparent. 1916Ibid. 31 Aug. 872/2 If the impulse is insufficient..we have the condition of undercuring and the rod falls back, corresponding with a gradual deterioration of the vulcanised product. 1940J. Osborne Dental Mech. xi. 128 Under-cured vulcanite is soft and weak, and permeable to mouth fluids and bacteria. 1952[see overcured ppl. adj. s.v. overcure v.]. 1965Encycl. Polymer Sci. & Technol. II. 53 This undercure slightly reduces the quality of the surface, but other advantages are gained so that today a substantial fraction of the total production of decorated, laminated sheet stock is plasticised. 1968SPE Jrnl. Nov. 47/1 Undercured resins are inferior..but long cure times are uneconomical. 1969Jrnl. Paint Technol. XLI. 702 (heading) Effect of undercuring on durability of siliconized polyester enamels with hexakis(methoxymethyl) melamine. |