In fact, it has been shown that by capping the sterically hindered isoprenyllithiun3 or styrewllithitun chain ends with one or more butadiene monomer units, the linking reaction involving Si[Cl.sub.4] can be made to be quantitative (
refs. 24 and 48).
So, the "tougher" the natural rubber results in a lower total energy at dump and a shorter factory mix cycle (
ref. 12).
Cussler et al (
ref. 9) have modeled this process for an idealized structure.
Optimization of these parameters with respect to mechanical properties of EPDM/PP blends was accomplished using a six factor/two level design of experiment scheme (
ref. 7).
The previous work (
ref. 20) on sample thickness was limited and therefore this is now investigated in further detail.
Products manufactured in this highly automated way are often of much higher value (
ref. 1) than, for example, parts that are welded or glued afterwards.
The two reactions of silanes during compounding, hydrolysis and condensation, have been well studied and reviewed (
ref. 6).
The gel-content may be determined by filtration, which gives a relative value depending upon the pore size of the filter (
ref. 4).
In addition to a rapidly growing use in automotive, further growth in construction and other sectors is projected, and by 1999, EPDM consumption is expected to become the largest of all elastomers in non-tire applications, overtaking natural rubber (
ref. 9).
It was later found that Shollenberger and co-workers had used it several years earlier to describe segmented polyurethane elastomers (
ref. 13).
Using only the first term, yields W = [c.sub.10]([I.sub.1] - 3), which indicates a linear relationship described as neo-Hookean by Rivlin (
ref 1).
Earlier work (
ref. 24) reported a direct comparison of [[eta].sub.app] viscosity measurements from the capillary rheometer vs.