The effects of injection moulding conditions (temperatures 120 and 160°C, pressures from 5 to 50 MPa) on the crosslink density of the resulting parts (determined from equilibrium solvent swelling experiments) have been studied for an elastomer of the liquid silicone rubber type in which crosslinking results from platinum catalysed vinyl–silane addition. It was shown, unexpectedly, that a pressure increase leads to an increase in the cure rate, despite the unfavourable effect of pressure on viscosity.
Get full access to this article
View all access options for this article.
References
1.
ETIENNEA.: STP Pharma, 1990, 6, (1), 33–40.
2.
AGUADISCHL. and COLASA.: Chimie Nouvelle, 1997, 15, (58), 1179–1188.
FLORYP. J. and REHNERJ.: J. Chem. Phys., 1943, 11, (11), 521–526.
10.
BUECHEA. M.: J. Polym. Sci., 1955, 15, 97–103.
11.
SHEEHANC. J. and BISIOA. L.: Rubber Chem. Technol., 1966, 39, 149.
12.
FLORYP. J.: ‘Principles of polymer chemistry’, chapter–title; 1953, Ithaca, NY, Cornell University Press.
13.
TRELOARL. R. G.: ‘The physics of rubber elasticity’, chapter–title; 1975, Oxford, Oxford University Press.
14.
LANGLEYN. R.: Macromolecules, 1968, 1, 353.
15.
FLORYP. J.: Ind. Eng. Chem., 1946, 38, 417.
16.
MILLERD. R. and MACOSKOC. W.: Macromolecules, 1976, 9, (2), 207–211.
17.
MACOSKOC. W. and MILLERD. R.: Macromolecules, 1976, 9, (2), 199–206.
18.
BARBAROUXM.: ‘Effects of the injection moulding parameters on the properties of a silicone network for pharmaceutical applications’, PhD thesis, ENSAM, no. 98-29, Paris, 1998.
