What question did this study set out to answer?

To evaluate the catalytic efficiency and orientation effects of bivalent metal ions during phenol-formaldehyde condensation for the production of high-ortho novolak resins.

December 1, 1957Journal of Applied Chemistry

Preparation of ‘high‐ortho’ novolak resins I. Metal ion catalysis and orientation effect

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Authors

DFD. A. FraserHealth Sciences and Nutrition RHRandall W. HallDominican University of California ARA. L. J. Raum

Discussion

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Implication

Laboratory study reveals bivalent metal ion catalysis directs ortho-substitution in novolak resins, highlighting tunable reaction rates and molecular weight distributions.

Key Points

To evaluate the catalytic efficiency and orientation effects of bivalent metal ions during phenol-formaldehyde condensation for the production of high-ortho novolak resins.
Carried out phenol-formaldehyde condensation reactions using electropositive bivalent metal catalysts (Mn++, Zn++, Cd++, Mg++, and Co++).
Determined the relative influence of specific metal ions on condensation reaction rates and ortho-substitution patterns (2- and 2:6-substituted phenolic nuclei).
Developed a resin fractionation technique to isolate fractions and compare molecular weight distribution curves across different synthesis methods.
Bivalent metal ions effectively catalyzed the selective production of 2- and 2:6-substituted phenolic nuclei, yielding novolak resins with elevated ortho isomer content.
Condensation rates and structural orientation varied depending on the specific bivalent metal ion catalyst applied.

Cite This Study

Fraser et al. (1957) studied this question.

synapsesocial.com/papers/6a72351ff44fa9f079dfc2e5 https://doi.org/10.1002/jctb.5010071207

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December 1, 1957Journal of Applied Chemistry

Preparation of ‘high‐ortho’ novolak resins I. Metal ion catalysis and orientation effect

View Full Paper

Ask AI

Bookmark

Authors

DFD. A. FraserHealth Sciences and Nutrition RHRandall W. HallDominican University of California ARA. L. J. Raum

Discussion

Member takes

Implication

Laboratory study reveals bivalent metal ion catalysis directs ortho-substitution in novolak resins, highlighting tunable reaction rates and molecular weight distributions.

Key Points

To evaluate the catalytic efficiency and orientation effects of bivalent metal ions during phenol-formaldehyde condensation for the production of high-ortho novolak resins.
Carried out phenol-formaldehyde condensation reactions using electropositive bivalent metal catalysts (Mn++, Zn++, Cd++, Mg++, and Co++).
Determined the relative influence of specific metal ions on condensation reaction rates and ortho-substitution patterns (2- and 2:6-substituted phenolic nuclei).
Developed a resin fractionation technique to isolate fractions and compare molecular weight distribution curves across different synthesis methods.
Bivalent metal ions effectively catalyzed the selective production of 2- and 2:6-substituted phenolic nuclei, yielding novolak resins with elevated ortho isomer content.
Condensation rates and structural orientation varied depending on the specific bivalent metal ion catalyst applied.

Cite This Study

Fraser et al. (1957) studied this question.

synapsesocial.com/papers/6a72351ff44fa9f079dfc2e5 https://doi.org/10.1002/jctb.5010071207

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