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Solubility of high molecular weight, sterically hindered amines in polypropylene

✍ Scribed by A. P. Mar'in; V. Borzatta; M. Bonora; L. Greci

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
176 KB
Volume
75
Category
Article
ISSN
0021-8995

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✦ Synopsis

The dissolution of four sterically hindered amines with molecular weights from 1364 to 2758 was studied in polypropylene in the interval, 60 -130Β°C. The solubility of the additives at 100Β°C passes through a maximum during time and the maximum solubility increases with increasing additive molecular weight. The rearrangement of the polymer structure during additives dissolution is discussed.

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Diffusion of high molecular weight, ster
Diffusion of high molecular weight, sterically hindered amines in polypropylene
✍ A. P. Mar'in; V. Borzatta; M. Bonora; L. Greci πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 145 KB πŸ‘ 1 views

The diffusion of sterically hindered amines with molecular weight 1364, 1393, 2286, and 2758 was studied in polypropylene between 60 and 130Β°C. The diffusion coefficient changes with time and plots log D vs 1/T are given as broken lines for additives with molecular weight 2286 and 2758. IR data show

Loss of high molecular weight, stericall
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✍ A. P. Mar'in; V. Borzatta; M. Bonora; L. Greci πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 167 KB πŸ‘ 1 views

The loss from polypropylene (PP) of sterically hindered amines with molecular weight ranging from 1364 to 2758 in heptane, chloroform, and methanol at room temperature was studied. The additives leak from polymer in heptane and in chloroform and some residual concentration remains in the polymer; th