The anionic solid-state polymerization of triclinic crystals of hexaphenylcyclotrisiloxane (HPhTS) initiated by KOH and potassium oligo(methylphenylsiloxane) has been studied. It was found that this reaction can yield high molecular weight poly(diphenylsiloxane) (PDPhS) with a specific viscosity up
Enhancement of solid-state polymerization with microwave energy
โ Scribed by Frederick K. Mallon; W. Harmon Ray
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 214 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0021-8995
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โฆ Synopsis
This work reports on using microwave energy to increase the rate of solidstate polymerization for PET and nylon 66. Theoretical analysis and experimental evidence show that the increase in polymerization rate is not due to an increase in the bulk temperature. Instead, the effect is consistent with directed heating of the condensate leading to enhanced diffusion rates.
๐ SIMILAR VOLUMES
It is possible to calculate the ground-state wave function and energy of a periodic solid by applying quantum chemical methods. The accuracy achieved is comparable with that for small molecules. The many-body problem of the correlated ground state is expressed in terms of cumulant scattering matrice
## Abstract Corn starch was crosslinked with sodium trimetaphosphate (STMP) in solid state under microwave irradiation to improve the degree of substitution (DS) and decrease the reaction time. The effects of modification factors on the crosslinking of starch were systematically studied. It was fou