Polymer characteristics and fracture morphology of radiation-polymerized methyl methacrylate-impregnated mortar

✍ Scribed by Vijay K. Bhattacharya; Mrinal M. Maiti; Sukumar Maiti

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 906 KB
• Volume: 30
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1985.070300512

✦ Synopsis

Normal portland cement mortar-PMMA co.mposites have been prepared under different doses of fh-60 gamma irradiation. The polymerization characteristics of MMA inside mortar and in bulk, mechanical and durability properties, and fracture morphology of the composites have been studied. The rate of in situ polymerization has been found to be faster than that in bulk. The molecular weights of the in situ and bulk PMMA were greatly reduced when a relatively higher dose of radiation was employed for the polymerization. However, the m e lecular weight of the PMMA-bulk was found to be higher than that of PMMA-in situ. The flexural/compressive strength and chemical durability in dil . H W 1 medium of mortar-PMMA composites were, in general, superior to those of mortar-€%, though they declined under prolonged exposure to gamma irradiation. SEM micrographs of the fractured surface of the composites suggest a strong mortar-PMMA interfacial bonding and varied texture of the imbibed polymer in the matrix.