𝔖 Bobbio Scriptorium
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Simple methods for demonstration of epoxy resins of bisphenol A type

✍ Scribed by Sigfrid Fregert; Lena Trulsson


Book ID
109365906
Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
452 KB
Volume
4
Category
Article
ISSN
0105-1873

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## Abstract Bisphenol A novolacs were synthesized in both melting and solution processes using __p__‐formaldehyde and formalin solution in presence of oxalic acid catalyst, respectively. Hydrogen nuclear magnetic resonance, ^1^H NMR, investigations show a high methylene bridge contents in the novol