From the literature identify the glass transition and melting temperature of the following polymers (a)Polypropylene (b)Poly(vinyl chloride) (c)Polyamide 6,6 (Nylon) (d)Polyamide 6 (polycaprolactam)

Q: The polypropylene (repeat unit CH3CHCH2) in a plastic object has a molar mass of 2.8x10^5 g/mol and…

A: Calculate the degree of polymerization: n=Molecular weight of polymerMolecular weight of…

Q: 3..Suggest how to make syndiotactic/isotactic polystyrene on the one hand and on the other hand how…

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Q: Discuss glass transition temperature and the factors affecting GTT and what are its significances.…

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Q: 2.5 Polymer/Filler Interface and Mechanical Properties Talk in general about the influence of…

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Q: The reciprocal of conductivity is Turbidity .a O None of the mentioned .b O Viscosity .c O…

A: Answer -  The reciprocal of conductivity is d) Resistivity.

Q: A type of liquid crystal that has an arrangement :spatially Cholesteric Nematic OSmectic Columnar…

A:

Q: 3. Estimate the degree of crystallinity of given polymer assuming that the area under red curve is…

A: Given: Area under the red curve = 47% area under the black curve. The degree of crystallinity, α,…

Q: n 14 ch of the following corresponds to a layer of ions unaffected by fluid motion and is separated…

A: According to Helmholtz this double layer consist of two opposite charged layers at a fixed distance…

Q: Q.A20 Complete the following sentence: The mechanical properties of polymers are... (A) brittle (B)…

A: A polymer can be define as a  natural or synthetic substances composed of very large molecules which…

Q: 6. why is the segmental mobility of a polymer reduced by the presence of the filter?

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Q: he radius of gyration of a long chain molecule isfound to be 7.3 nm. The chain consists of C- C…

A:

Q: a)What are the methods of synthesizing the carbon nanotube in solid phase and gas phase, please…

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Q: In a step growth polymerization, there are 1.34 mol A-A type monomer, 1.33 mol B-B type monomer, and…

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Q: what is liquid junction potential ?

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Q: The radius of gyration of a long one-dimensional chain molecule is found to be 7.3 nm. The chain…

A:

Q: Show that the packing fraction of BCC is 0.68.

A: Show that, Packing fraction of BCC is 0.68

Q: Melting Pt. (°C) Boiling Pt. (°C) Substance Appearance Conducts as Conducts as solid liquid…

A:

Q: Properties of Liquids and IMF.   Give a brief explanation

A: There are three main states of matter - solid, liquid, and gases. The liquid is a state of matter in…

Q: What is the main factor in not observing the glass transition behavior in highly cross-linked and…

A: Glass transition behavior in highly cross-linked and highly crystalline polymers.

Q: Explain what type of carbonate polymorphs may be present in saw dust derived biochar prepared at 300…

A: Saw dust is also known as wood shaving. It is by product obtained from biochar.

Q: Q.3. Define the following term Frenkel defect, Vitreous clays, Metakaolin, Attrition milling, X-ray…

A: Frenkel defect : A Frenkel defect is a type of point defect in crystalline solids which named after…

Q: c. Nylon 6 and poly(e-caprolactone) have similar polymer backbone structure with one carbonyl, 5…

A: Introduction :  Polymer can be defined as the substance containing a large number of repeating units…

Q: Write TWO (2) functions of XRF in materials characterisation. (b) Appraise the sample preparation…

A: Hello. Since the question consists of multiple sub-parts, the first three sub-parts shall be solved…

Q: Q/ Briefly explain how these factors affect wettability 1-the pore size 2- the surface roughness…

A: Wettability: it is an ability of a liquid to stay in contact with a solid surface.

Q: Predict the aggregation and describe using diagrams the hydrogen bonding arrangements expected in…

A: molecules are aggregated with other molecule by formation of the H-bonding.

Q: Describe the process of simple diffusion?

A: Definition: Diffusion is the movement of particles from the region of high concentration to the…

Q: The polypropylene (repeat unit CH₃CHCH₂) in a plastic toy has a molar mass of 2.8X10⁵ g/mol and a…

A: Here poly propylene  is a polymer having propene as a monomers. The monomeric unit added itself to n…

Q: The experimentally measured density of a bulk material is slightly higher than expected based on the…

A: Solution A material could be a substance or mixture of drugs that constitutes associate degree…

Q: Determine whether the first part of statement will INCREASE, DECREASE or HAVE NO EFFECT in the…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: Briefly discuss the effect of thermodynamic on polymerization.

A: Polymerization is a process in which many monomers join together to form a large macromolecule.…

Q: 5. For which set of crystallographic planes will a first-order diffraction peak occur at a…

A:

Q: What is glass transition and melting temperatures Tg and Tm? Briefly describe

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

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Q: What effect does the presence of an α-Methyl group in a polymer chain have on the glass transition…

A: The effect of alpha Methyl group on the glass transition temperature (Tg) in a polymer chain is as…

Q: 3 Rubidium (Rb) adopts a body-centred cubic, BCC, structure at a pressure of 1 atm. Upon application…

A: (i) The main factor for transformation from BCC to FCC is the decrease in spacing among atoms due to…

Q: or introduce the following topics of polymer : • Thermoplastic/thermoset elastomer…

A: The process of formation of large molecules from repetitive addition of monomer units is called as…

Q: Draw the isotactic, syndiotactic, and atactic form of polypropylene.

A: characterstics of these three polymers are as follows : Isotactic polypropylene is strong and hard…

Q: If you want to determine the glass transtion tempreture (Tg), softening point (Ts), melting point…

A: The glass transition temperature (Tg) is the temperature at which an amorphous polymer or an…

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Q: Distinguish between Chemiluminescence and Triboluminescence and give an  example of each.

A:

Q: The monomer of poly(vinyl chloride) has the formula C₂H₃Cl. If there are 1565 repeat units in a…

A: To calculate the molecular mass (in amu) of the chain that contains 1565 units of C₂H₃Cl.

Q: To what height would you expect ethanol (γ= 22.39 mN m-1 at 298 K, ρ = 789 kg m-3) to climb by…

A: The column height of a narrow capillary is obtained from following equation.

Q: 2. (a) Explain what is meant by the glass transition temperature Tg of a polymer and briefly…

A: Glass transition temperature, a temperature where polymers change from glassy state to rubbery…

Q: Which of the following polymers has a syndiotactic structure? A B D

A: On the basis of the stereochemistry the polymers are of three types: Isotactic polymer: In these…

Q: alculate the plane density of (l10) plane at BCC Crystal structure ?

A: The crystal structure is BCC  The plane is (110)

Q: A new strontium iron(III) oxide is calculated to have narrow partially-filled conduction band but is…

A: Between the Fermi level and the conduction band edge, the novel strontium iron(III) oxide (SrFeO3)…

Polymers

Polymers are naturally occurring or synthetically produced large molecules or compounds which are made up of series of repeating units called monomers. They are joined together by chemical bonds. The term polymer is coined from Greek roots meaning 'many parts' and are found almost everywhere from the plastics bags to the rubber of our tires to our DNA strands.