|
In the 19th century Charles Macintosh mixed a solvent called naphtha with this substance to make a waterproof material |
rubber
|
$1,600 |
DJ |
SCIENCE EXPERIEMENTS |
2024-05-16 |
#9104 |
|
The Charles Goodyear Award recognizes contribution to this tire materials industry |
rubber
|
$800 |
DJ |
SCIENCE PRIZES |
2002-09-20 |
#4150 |
|
Ebonite, a hard, black material, is made by vulcanizing a mixture of about 2 parts this to 1 part sulfur |
rubber
|
$300 |
J |
SCIENCE |
1996-04-19 |
#2690 |
|
Soft & sticky in warm weather & brittle in cold weather, add sulfur & heat it to vulcanize it |
rubber
|
$400 |
DJ |
GENERAL SCIENCE |
1994-12-05 |
#2361 |
|
Joseph Priestley gave this name to some tree sap that could wipe out pencil marks |
rubber
|
$200 |
J |
GENERAL SCIENCE |
1991-11-28 |
#1669 |
|
Vulcanization increases the hardness of this by heating it with sulphur |
rubber
|
$100 |
J |
SCIENCE |
1991-06-12 |
#1578 |
|
Neoprene is considered an artificial form of this |
rubber
|
$200 |
DJ |
SCIENCE |
1990-10-11 |
#1404 |