By Anil Kumar
Exploring the characterization, thermodynamics and structural, mechanical, thermal and delivery habit of polymers as melts, suggestions and solids, this article covers crucial innovations and breakthroughs in reactor layout and polymer creation and processing. It comprises glossy theories, end-of-chapter difficulties and real-world examples for a transparent knowing of polymer functionality and improvement. basics of Polymer Engineering, moment variation offers an intensive grounding within the basics of polymer technological know-how for extra complex research within the box of polymers. subject matters comprise response engineering of step-growth polymerization, emulsion polymerization, and polymer diffusion.
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Extra resources for Fundamentals of Polymer Engineering, Revised and Expanded
Do you think that the conﬁguration would have any inﬂuence on the electrical conductivity? 9. Polyphenylene sulﬁde is an important electronic polymer and can be synthesized using p-dichlorobenzene with Na2S in n-pyrolidone (Campbell method). Its initiation step is as follows: Initiation Propagation The termination of the polymer could occur with A (by combination) as well as B (by transfer reaction) and write these reactions. 10. The following polymer poly(glutamic acid) is used as an antitumor agent: where Ig is a protein immunoglobin.
The polymer thus formed has short-chain as well as long-chain branches, which have been explained to occur through the ‘‘backbiting’’ transfer mechanism. The short-chain branches (normally butyl) are formed as follows: Copyright © 2003 Marcel Dekker, Inc.
3: Anticancer compounds used in chemotherapy are low-molecularweight compounds, and on its ingestion, it is not site-speciﬁc to the cancerous tissues leading to considerable toxicity. How can polymer help reduce toxicity? How does this happen? Give a few examples. Solution: Macromolecules are used as carriers, on whose backbone both the anticancerous compounds as well as the targeting moieties are chemically bound. As a result of this, the drug tends to concentrate near the cancerous tissues. The targeting moieties are invariably complementary to cell surface receptors or antigens, and as a result of this, the carrier macromolecule can recognize (or biorecognize) cancerous tissues.