The chemically initiated solid-state polymerization of hexamethylcyclotrisiloxane
| ISSN: |
0021-8995
|
|---|---|
| Keywords: |
Chemistry ; Polymer and Materials Science
|
| Source: |
Wiley InterScience Backfile Collection 1832-2000
|
| Topics: |
Chemistry and Pharmacology
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Physics
|
| Notes: |
The HBr-initiated solid-state polymerization of hexamethylcyclotrisiloxane has been investigated. Up to about 70% conversion, the rate of polymerization is found to be constant but the molecular weight of the polymer formed was observed to increase with conversion. Temperature did not have a marked effect on the polymerization rate as an activation energy of only 2.8 kcal/mole was observed, whereas the rate was found to be exponentially related to the HBr vapor pressure. The HBr and the radiation-initiated solid-state polymerization are compared.
|
| Additional Material: |
4 Ill.
|
| Type of Medium: |
Electronic Resource
|
| URL: |