Essays on Adhesives

Status of the document.

This document is a project proposal for the development of starch-based hemostatic products. Acknowledgement. Much thanks to the project supervisor who offered guidance in every step of the development of this proposal. Developing starch based hemostatic products Project summary. Purpose: This proposal is envisioned to develop a hemostatic agent from purified plant starch. In this case, the product of the reaction should be developed by the formation of microporous hemosphere particles after etherification, esterification and crosslinking of glucose molecules to form ethyl propanetriol (glycerol-ether links (1-3 deoxy propanol)). The second intention of this study is to investigate the properties ...

Lignin Chemistry

Lignin History Lignin is a plant-derived biopolymer with several applications. It is considered an effective alternative to chemically synthesized plastics that pose serious environmental problems during manufacture and disposal. Lignin is often obtained as a byproduct in paper and pulp manufacture. Lignin has to be dissolved to obtain cellulose from wood. In 1838, Anselme Payen discovered that wood contained cellulose, and oxidizable coatings (later called lignin) that bind the cellulose together (McCarthy and Islam, 2000). This coating material could be removed from wood after acid treatment and washing with an aqueous alkali solution (McCarthy and Islam, 2000). Later, several ...

Polyisocyanurate or Polyiso or ISO owes its popularity to its excellent thermal insulation performance (determined by its R-value). This thermosetting polymer gets its hardened, irreversible, and thermally insulating molecular structure with the application of heat. This property of Polyisocyanurates is particularly useful for roofing insulation applications. But the advantages of these materials and their significance do not end with just one property. There is a significant amount of reasons why many constructors prefer to use these polymers over others as a viable insulation material for their roofing materials. This essay is an attempt to study the significance of Polyisocyanurate ...