Branched polymers. II—Dimensions in non-interacting media
✍ Scribed by T.A. Orofino
- Publisher
- Elsevier Science
- Year
- 1961
- Tongue
- English
- Weight
- 491 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0032-3861
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A~traet--Aberchrome 540 dye is amber in its ring-opened form (A) [(E)-ct-(2,5-dimethyl-3-furylethylidene) (isopropylidene) succinic anhydride]. Irradiation with u.v. (2 > 300 nm) causes the molecules to undergo conrotatory ring-closure and the dye is in its red form (B) [7,7a-dihydro-2,4,7,7,7a-pent
## Abstract It is pointed out that a theory proposed by Vrij for the expansion of a linear polymer chain in solution beyond its unperturbed size is also applicable formally to branched chains. The theory predicts the temperature at which the chain obeys random‐flight statistics to be lower for a br