โ Scribed by John F. Norris; F.W. Peaker
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
## Abstract It has been shown^1^ that most degradation processes in vinyl polymers can be regarded as polymerization processes in reverse, both occurring by means of a radical mechanism. Under certain experimental conditions, both aggregative and disaggragative processes can proceed simultaneously.
The mechanical shear degradation of polydisperse polyisobutene and monodisperse polystyrene in oils of different viscosities in the concentration range of 0.1% to 1% was studied using a high-shear concentric cylinder viscometer under laminar and uniform well-defined shear field conditions. Molecular
Polymer degradation occurs when macromolecular chains are broken under the injluence of thermal, mechanical or chemical energy. Chain-end depolymerization and random-and midpoint-chain scission are mechanisms that have been observed in liquidphase polymer degradation. Here we develop mathematical mo
Atactic polypropylene was oxidized in solution in the presence and absence of radical initiator over the temperature range of 140' to 200'C under oxygen pressure of 3.3 to 12.4 kg/cm2, and the effects of metal catalyst and additives on the rate, products, and change in molecular weight distribution