Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Missouri University of Science and Technology

Theses/Dissertations

1965

Polymethylmethacrylate -- Thermal properties<br />Polymethylmethacrylate<br />Thermal analysis -- Measurement

Articles 1 - 2 of 2

Full-Text Articles in Engineering

Thermal Degradation Of Poly (Methyl Methacrylate) In Solution In Various Solvents, Ya-Chih Chen Jan 1965

Thermal Degradation Of Poly (Methyl Methacrylate) In Solution In Various Solvents, Ya-Chih Chen

Masters Theses

"A study has been made of the thermal degradation of poly (methyl methacrylate) of different molecular weights in toluene, ethyl acetate and chloroform. Four poly (methyl methacrylate) samples having molecular weights of 2,210,000, 733,000, 320,000, and 43,00, respectively were studied in this investigation. The results indicated that the polymer having a molecular weight of 2,210,000 undergoes degradation while the low molecular weight polymers having molecular weights of 733,000, 320,000, 43,000 undergo reverse polymerization"--Abstract, page [ii].


Thermal Degradation Of Poly (Methyl Methacrylate) In Solutions In A Closed System, Vikram Pranjivandas Parikh Jan 1965

Thermal Degradation Of Poly (Methyl Methacrylate) In Solutions In A Closed System, Vikram Pranjivandas Parikh

Masters Theses

"A study has been made of the thermal degradation of poly (methyl methacrylate) of two different molecular weights, 2,303,000 and 43,000, in 1,2-dichloroethane in a closed system. The results indicated that the polymer having a molecular weight of 2,303,000 undergoes degradation while the low molecular weight polymer 43,000 undergoes reverse polymerization, and the molecular weight remains constant. The molecular weight of high molecular weight samples after 48 hours decreased from 2,303,000 to 2,232,000 and 1,690,400 at 50⁰C and at 98.5⁰C, respectively"--Abstract, page [i].