Gel fraction of the prevulcanized gelled latex films was measured by immersing the dried film samples in toluene at room temperature (25 [+ or -] 1[degrees]C) for 48 h (equilibrium swelling time that was determined from the experiments), and calculated from the weight of the samples before and after swelling as follows:
The gel content and crosslink density values of all different gelled lattices were determined from equilibrium solvent swelling method from the dried gelled latex films.
The gels would allow the military to better control rockets because motors running on gelled
fuels could be throttled up and down and controlled more precisely than conventional rockets that use solid propellants, Heister said.
Figure 4 shows the photographs of ampoules containing gelled
sample no-gel sample and a sample intermediate of the above two.
Magnum is the nation's sole producer of gelled
fuel fireplaces, and under the direction of president Ray Dallard it has grown from a run-from-the-home operation into coast-to-coast distributor.