WebSome important properties of bakelite are listed below. It can be quickly molded. Very smooth molding can be obtained from this polymer. Bakelite moldings are heat-resistant and scratch-resistant. They are also resistant … WebNovolac or resin is a linear polymer and is used in the manufacture of adhesive. B. Bakelite is a cross-linked polymer and is used in making switches and plugs. C. Novolac is prepared when (P/F) (phenol/formaldehyde) ratio is greater than 1, whereas bakelite is prepared when (P/F) ratio is less than 1. D.
Polymers Free Full-Text Hydrocarbon Resin-Based Composites …
Weblink novolac precursors obtained under acidic conditions. Methylene released by HMTA at elevated temperature can cause the linear novolac 3-D cross-linking to form a thermosetting polymeric framework. Web28 mei 2014 · Typical phenolic resins, that is, random novolac and high ortho novolac, were supplied by Sumitomo Bakelite Co., Ltd (Tokyo, Japan). The molar masses and … little big fats wynantskill new york
Monomer of Novolac is : Filo
Web14 jun. 2024 · Novolac is linear chain polymer while Bakelite is cross linked polymer. Question 56. Low density polythene and high density polythene, both are polymers of … Web2 jul. 2010 · However, when novolac epoxy resins are cured using the same hardener, no dripping is observed. This can be justified by the difference in internal structure of the … Web23 mrt. 2024 · This process produces a solid prepolymer called a novolac (or novolak), which resembles the final polymer except that it is of much lower molecular weight and is still thermoplastic (that is, it can be … little big fireworks