## Abstract The factors that affect the dispersion of exfoliated organically modified montmorillonite in a solution of poly(methyl methacrylate) in methyl methacrylate are explored. Exfoliation of montmorillonite in the solution is achieved with the assistance of ultrasound, and rheological measure
Factors influencing the creep behavior of poly(methyl methacrylate) cements
โ Scribed by Treharne, Richard W. ;Brown, Norman
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- English
- Weight
- 305 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0021-9304
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
Room temperature compression creep and recovery tests have been performed using samples of pure poly(methyl methacrylate) (PMMA), three commercially available poly(methyl methacrylate) cements, and several experimental cements. From these tests the influence of density, mixing procedure, particle size, methyl methacrylateโstyrene copolymer, barium sulfate, aquenous storage environments, residual monomer, molecular weight of the continuous phase, benzoyl peroxide, and N,Nโdimethylโparatoluidine, upon the creep behavior of PMMA cements has been determined. The important result is that lowering the porosity or residual monomer content, increasing the powder size, or adding an MMAโstyrene copolymer tends to increase the creep resistance of PMMA cement.
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The authors are indebted to Prof. E. Straube (Halle), Prof. K.-F. Arndt (Dresden) and Prof. J. Kressler (Merseburg) for helpful discussions concerning scattering measurements. Thanks to Chr. Sommer for support in static light scattering experiments.
## Abstract Previous efforts have demonstrated that highโpressure CO~2~ can markedly influence the phase behavior of amorphous polymer blends. In this work, we examine the effect of highโpressure CO~2~ on the miscibility of blends composed of glassy poly(methyl methacrylate) (PMMA) and semicrystall