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FORMALDEHYDE RESINS...

FORMALDEHYDE RESINS

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{:(ul("List - I")" (polymer)",ul("List - II")" (Stucture)"),("1) Urea formaldehyde resin","a) "(-NH-(CH_(2))_(5)-CO-)_(n)),("2) Neoprene","b) "(-NH-(CH_(2))_(6)-NH-)_(n)),("3) PVC","c) "(-CH_(2)-underset(Cl)underset(|)C=CH-CH_(2)-)_(n)),("4) Nylon - 5","d) "(-CH-underset(Cl)underset(|)CH-)_(n)),(,"e) "(-NH-CO-NH-CH_(2)-)_(n)):}

Polymers containing -CONH- linkage among , nylon, bakelite, urea formaldehyde resin, buna-s, neoprene, natural rubber, proteins.

Elastomers/Fibres || Thermoplastics and Thermosetting Polymers || Nylon || Bakelite || Melamine Formaldehyde Resin || Biodegradable Polymer

The cation exchange resin is of the type. resin -H^(+) while anion exchange resin Is of the type resin -OH^(-) .

[A] : Pinus bears resin canals . [R] : Resin canals are found in cortex and bounded by a glandular epithelial layer that secretes resin.

[A] : Pinus bears resin canals . [R] : Resin canals are found in cortex and bounded by a glandular epithelial layer that secretes resin.

[A] : Pinus bears resin canals . [R] : Resin canals are found in cortex and bounded by a glandular epithelial layer that secretes resin.

[A] : Pinus bears resin canals . [R] : Resin canals are found in cortex and bounded by a glandular epithelial layer that secretes resin.

Epoxy resin is