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Polymer Engineering > Industrial Techniques Of Polymerization > Flashcards

Industrial Techniques Of Polymerization Flashcards

1
Q

Polymerization reactions are ___________.

A

Exothermic

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2
Q

The simplest technique and the one that gives the highest purity polymer.

A

Bulk Polymerization

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3
Q

Due to active radical sites accumulation, the rate of polymerization increases enormously and sometimes, the uncontrolled exothermic reactions can lead to an explosion.

A

Auto Acceleration or Trommsdorff Effect

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4
Q

The slowing of termination processes is caused by ____________ of the polymerizing solution.

A

Localized Increases in the Viscosity

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5
Q

A polymerization technique that is employed in industrial application.

A

Solution Polymerization

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6
Q

In this procedure, a monomer is dissolved in a nonreactive solvent that contains a catalyst or initiator.

A

Solution Polymerization

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7
Q

Saturated and require vulcanization employing free radical processes produced by solution polymerization employing Ziegler-Natta Catalysts.

A

Ethylenepropylene Copolymers (EPMs)

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8
Q

Produced by the polymerization of vinyl acetate in the presence of an initiator in a solution such as benzene.

A

Poly(vinyl acetate) (PVAc)

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9
Q

Refers to the polymerization in an aqueous system with monomer as a dispersed phase, resulting in polymer as a dispersed solid phase.

A

Suspension Polymerization.

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10
Q

Kinetically, suspension polymerizations are _____________.

A

Water-cooled Bulk Reactions

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11
Q

Results to nonporous polymer particles that are formed where the polymer is soluble in monomer such as PS and PMMA.

A

Bead Polymerization

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12
Q

Refers to the polymerization process whose polymer is not soluble in its monomer and the resultant bead will be porous and irregular.

A

Powder Polymerization

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13
Q

Porous particles where the polymer is insoluble in monomer and precipitates during polymerization.

A

Powders

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14
Q

A type of radical polymerization that usually starts with an emulsion incorporating water, monomers, and surfactants.

A

Emulsion Polymerization

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15
Q

The frequently used dispersion medium in emulsion polymerization as it is cheap and environmental friendly.

A

Water

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16
Q

A form of bulk polymerization in which monomers are in the solid phase and subjected to temperatures below the melting point to introduce energy for initiation and propagation steps of polymerization.

A

Solid State Polymerization

17
Q

In ________ polymerization, the gaseous monomer is presented to a reactor with a polymerization initiator.

A

Gas-phase

18
Q

Uses plasma or high-energy gas to increase the energy in a gaseous or liquid monomer and fragment them to initiate polymer formation.

A

Plasma Polymerization

19
Q

Enumeration.
Types of Commercially Processed Polymers .

A
  1. Hydrocarbon Plastics and Elastomers
  2. Other Carbon-Carbon Polymer
  3. Heterochain Thermoplastics
  4. Thermosetting Resins
20
Q

Enumeration.
Type of Hydrocarbon Plastics and Elastomers.

A
  1. Polyethylene
  2. Polypropylene
  3. Olefin-Based Polymers and Copolymers
  4. Natural Rubber and Polyisoprenes
  5. Rubbers derived from Butadiene
21
Q

Enumeration.
Types of Carbon-Carbon Polymer

A
  1. Polystyrene
  2. Acrylic Polymers
  3. Polyvinyl esters
  4. Chlorine-containing Polymers
  5. Fluorine-containing Polymers
22
Q

Enumeration.
Types of Heterochain Thermoplastics

A
  1. Polyamides and Polypeptides
  2. Polyesters and Polyethers
  3. Cellulosic Polymers
  4. High-temperature and Inorganic Polymers
23
Q

Enumeration.
Types of Thermosetting Resins.

A
  1. Phenolic and Amino Resins
  2. Unsaturated Polyester Resins
  3. Epoxy Resins and Polyurethanes
  4. Silicone Polymers
24
Q

The simplest technique and the one that gives the highest purity polymer.

A

Bulk Polymerization

25
Q

Enumeration.
These are used to control molecular weight in bulk polymerization.

A
  1. Monomer
  2. Monomer-soluble Initiator
  3. Chain Transfer Agent
26
Q

Enumeration.
Primary components of

A

Polymer Engineering (6 decks)

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