Chapter 11 Key words

Question 1

monomer

Answer 1

a molecule that can be bonded to other identical molecules to form a polymer

Question 2

polymer

Answer 2

a substance that has a molecular structure built up from a large number of similar units (monomers) bonded together

Question 3

Synthetic

Answer 3

a manufactured substance that imitates a natural product

Question 4

Natural polymer

Answer 4

Animals horns/hooves molded into a variety of shapes. (natural rubber latex made form rubber trees) these were before plastics and synthetic polymers, they held make life possible.

Question 5

synthesized

Answer 5

made by combining different parts

Question 6

polymerisation

Answer 6

process of joining small molecules to form polymers (long chains)

Question 7

additives

Answer 7

substances added to polymers to improve their mechanical properties

Question 8

catalyst

Answer 8

chemical that cause a reaction to happen

Question 9

down cycling

Answer 9

recycling into a lower quality product

Question 10

Polymer recycling codes

Answer 10

Symbol and number. Identify what type of polymer used to make the product. For recycling purposes it’s essential to know which type of plastic it is.

Question 11

biobased

Answer 11

a product made form a renewable source

Question 12

biodegradable

Answer 12

the ability of a substance to break down naturally in the environment through the action of micro-organisms, avoiding pollution.

Question 13

stock form

Answer 13

commonly available forms of polymer that can be bought

Question 14

standardized components

Answer 14

an individual part/component manufactured in thousands or millions to the same specification

Question 15

wastage

Answer 15

cutting away material to leave a desired shape

Question 16

CNC

Answer 16

computer-controlled machine used in industry

Question 17

welding

Answer 17

a fusion of metal caused by intense heat

Question 18

line bending

Answer 18

bending a polymer sheet after softening a narrow strip

Question 19

press moulding

Answer 19

forming a hollow shape from a softened polymer sheet

Question 20

vaccum forming

Answer 20

producing thin hollow items over a shaped mould

Question 21

mould

Answer 21

made to the shape required to be used many times

Question 22

structural integrity

Answer 22

keeping an object balanced

Question 23

reinforce

Answer 23

to strengthen/support an object or substance within additional material

Question 24

UN degradation

Answer 24

weakening of polymers when exposed to the Ultraviolet light in the sun light

Question 25

stabiliser

Answer 25

an additive added to polymers to help them withstand UV degradation

Question 26

Iterative modelling

Answer 26

repeated modelling to develop an idea

Question 27

dichloromethane

Answer 27

a solvent used to join polymer pieces together

Question 28

block models

Answer 28

an informal model that captures the forms of an idea- tends to have no moving parts

Question 29

co-injection molding

Answer 29

an injecting-molding process hat uses 2 different polymers

Question 30

flash

Answer 30

excess material formed between the joint of a mold

Question 31

gate

Answer 31

entry point for molten plastic to flow into a mold

Question 32

self-finishing

Answer 32

a material that requires no further coatings or finishing processes

Question 33

CAM

Answer 33

Computer-aided manufacture

Question 34

rapid prototyping

Answer 34

process of making a 3D shape from a digital file

Question 35

CAD

Answer 35

computer aided design

Question 36

CAE

Answer 36

Computer aided engineering

Question 37

FEA

Answer 37

Finite element analysis

Question 38

Fabrication

Answer 38

Making parts by gluing/turning/carving or welding

Question 39

GRP

Answer 39

Glass- reinforced plastic

Question 40

One-off production

Answer 40

Making one/small number of products. Usually used for specialist products

Question 41

Batch production

Answer 41

Making a set number of identical products

Question 42

mass/high volume production

Answer 42

producing very large numbers of products

Question 43

stakeholders

Answer 43

a person with an interest in the success of a product

Question 44

viability

Answer 44

ability to work successfully

Question 45

lean manufacturing

Answer 45

a systematic method for the elimination of waste within a manufacturing system

Question 46

tolerance

Answer 46

an allowable amount of variation of a specified quantity, especially in the dimensions of a part