A substance that affects the rate of chemical reaction of materials.

Materials made by man using both organic and inorganic substances.

A combination of at least two materials, one of which is a metal whose properties are different from its original form.

Large molecules made by boding a series of building blocks.

An inorganic non-metallic solid made up of either metal or non-metal compounds, primarily used in pottery.

A collection of several strands of glass that are mixed with plastic to make it durable.

the packing of molecular chains to produce an ordered atomic array

considered to be the polymer analogue of grains in polycrystalline metals and ceramics

Polymers are neither as strong nor as stiff as metals. However, their high flexibilities, low densities, and resistance to corrosion make them the materials of choice for many applications.

This behavior is characterized by the relaxation modulus, a time-dependent modulus of elasticity.

Fracture strengths of polymeric materials are high relative to those of metals and ceramics.

Thru _________________ stiffness and strength are enhanced by permanently deforming the polymer in tension.

Deformation corresponds to the unkinking and uncoiling of chains in response to an applied tensile stress.

The crosslinking process in elastomers, which is achieved by a nonreversible chemical reaction, typically carried out at an elevated temperature.

randomly oriented molecules in the liquid phase transform into chain-folded crystallites that have ordered and aligned molecular structures

The ___________________ of crystalline regions of a polymer corresponds to the transformation of a solid material having an ordered structure of aligned molecular chains into a viscous liquid in which the structure is highly random.

Upon cooling, this phenomenon corresponds to the gradual transformation from a liquid into a rubbery material, and finally into a rigid solid.

Polyethylene, polypropylene, poly (vinyl chloride), polystyrene, and the fluorocarbons, epoxies, phenolics, and polyesters are example of what?

Used primarily in textiles. Mechanical, thermal, and chemical characteristics of these materials are especially critical.

These materials have unusual properties and are used in a host of high-technology applications.

The synthesis of high-molecular-weight polymers.

A polymerization where the monomer units are attached one at a time in chainlike fashion to form a linear molecule.

A polymerization which involves stepwise intermolecular chemical reactions that may include more than a single molecular species.

The properties of polymers may be further modified by using additives; these include fillers, plasticizers, stabilizers, colorants, and flame retardants.

They are added to improve the strength, abrasion resistance, toughness, and or thermal/dimensional stability of polymers.

Are frequently applied to the surface of materials to serve one or more of the following functions: (1) to protect the item from the environment, which may produce corrosive or deteriorative reactions; (2) to improve the item’s appearance; and (3) to provide electrical insulation.

A stable suspension of small, insoluble polymer particles dispersed in water.

What is the definition of a composite?

Laminated glass is often used to make...

Composites always have at least a ______ and a _______

what is a matrix

what is reinforcement

considered to be any multiphase material that exhibits a significant proportion of the properties of both constituent phases such that a better combination of properties is realized

consist of particles of one material dispersed in a matrix of a second material

Composites with exceptionally high specific strengths and moduli have been produced that use low-density fiber and matrix materials.

Which joining technique for composite materials involves using specially designed fasteners to mechanically connect components?

Which property of composite materials makes them suitable for electromagnetic shielding applications?

Which of the following is not a potential cause of the failure of a new product?

Having smartphone screens that repel greasy fingerprints is achieved using which of the following?

Thermosetting plastics are formed by

Which of the following is a property of thermosetting plastics?

Which among these is an example of a commodity thermosetting plastic polymer material?

Which of the following is not an example of a thermoplastic polymer?

Suspending agent is used in ---------

Polystyrene beads those are used as ion-exchangers for the water treatment are prepared by

----------- is used as de-emulsifier in emulsion polymerization.

Nylon 6,6 is obtained by ------------------- polymerisation.

Phenol is removed during the formation of --------------.

Combination of ----------------- and diol or triol produces polyurethane.

Composites consist of -------- important constituents.

----------- phase is the continuous body constituent, which encloses the composite.

----------------- phase is the structural constituent, which determines the internal structure of composite.

The fibre reinforced polymer composites constitute more than ----------- (by weight) of the total composites used in various industries.

It is difficult to manufacture --------------- FRP.

Due to the ---------- property, rubbers are called elastomers.

Based on the source, there are ----------- type of rubbers.

Natural rubber consists of basic materials a latex, which is a dispersion of --------------------.

what is reinforcement

What is the definition of a composite?

------- moulding is used to fabricate hollow bottles.

--------------------- materials are used in compression moulding

The addition of --------------- to the natural rubber with heating is called vulcanization.

Consists of particles of one material dispersed in a matrix of a second material