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regions in polymers make the polymer flexible. Amorphous O Cross linked O Crystalline O Cross linked...
a-In polymers, why is thermal conductivity different in crystalline regions, compared to non-crystalline (amorphous) region? b-What is a phonon? How is it related to thermal conductivity?
Describe the crystalline and amorphous states in thermoplastic and thermosetting polymers. How many transitions do take place in those polymers? Do you think that every polymer type has a melting point? why or why not?
How are crystalline and amorphous polymers different? Write about the properties and applications of any : - Four Crystalline polymers Four Amorphous polymers (7 Marks)
The molecules in an amorphous polymer O are highly ordered in some regions and randomly oriented in others. form straight chains that cross each other at random angles. form highly ordered long fibers that exhibit great strength. are randomly oriented which results in them getting tangled with each other. O
how is charge separation achieved in crystalline silicon, amorphous silicon and polymer solar cell.
how is charge separation achieved in crystalline silicon, amorphous silicon and polymer solar cell.
A polymer blend contains cross-linked polybutadiene (70%) as a matrix and polyethylene (30%) as a dispersed phase. The polymers are immiscible. Briefly describe the experimental techniques and procedures that should be used to determine the structure and properties of the blend?
28 Bakelite, a durable plastic used for the casing of early radios and TVs, was the first of the thermosetting polymers. It is a highly cross-linked polymer formed from the acid-catalyzed polymerization of phenol and formaldehyde. Because it is much darker than Melmac, Bakelite's range of colors is limited. Propose a structure for Bakelite. a. Draw the structure of a short segment of PHB. b. Draw the structure of a short segment of PHBV with alternating monomers.
28 Bakelite, a...
QUESTION2 What is common between the plasticity mechanism of semi-cystalline plassic polymers and polycnystalline metalbs? O slips justify both O untangling the amorphous regions justifies polymeric plasticity while slips justity metallic olasticity 0.5 points Save Answer chain orientation justifies polymeric plasticity while the dislocation theory justifies metalic plasticity chanege inthe equaterium distance jesifits both 1 points Save Answer QUESTION 3 Estimate the upper l mit of the eastK modulus of concrete (45 decimal points Elastic modulus of gravel 150 MPa...
Using Polymers to Investigate the Behavior of Molecular and Ionic Compounds Post-Lab COONE COONa C=O COOH COONa 0 _Crosslinking molecule Regions of high ion concentration COONa COON C=O COOH COONa Figure 8.2. Two sodium polyacrylate polymer chains connected by a crosslink- ing molecule. The crosslinking creates a space for water to be trapped between the polymer chains. Part A 1. What is a polymer? Monomer? 2. Look up and draw the monomers used to make sodium polyacrylate polymer chains.