Determinaton of Methylol Groups in Phenolic Resins
✍ Scribed by Stenmark, G. A.; Weiss, F. T.
- Book ID
- 121448431
- Publisher
- American Chemical Society
- Year
- 1956
- Tongue
- English
- Weight
- 399 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0003-2700
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📜 SIMILAR VOLUMES
j l O ## LILLEY AND O S M O N D 4 . METHYLOL GROUPS some decrease in shear strength. At a suggestion from Dr. K. W. Pepper of the Chemical Research Laboratory the period at 0% R.H. was extended to three weeks, six samples then giving the following figures :--595, 670, 584, 635, 656, 630 : average
Grey seal blribber oilconipotientglycerides. The data in Table V permit some general conclusions to be reached concerning the chief types of mixed glycerides present in the seal blubber oil. The probable constitution of the oil is illustrated in Table VI, whilst the proportions, per 100 mol. of tota
## Abstract A total of 13 of the 16 possible methylol derivatives of 2,4′‐ and 4,4′‐dihydroxydiphenylmethane have been synthesized, isolated, and identified. These compounds are found as intermediates in the cure process of resol phenol–formaldehyde (PF) resins. Analysis of the ^13^C NMR spectra (i