4 Ergebnisse.

To the surprise of practically no one, research and engineering on multi­ polymer materials has steadily increased through the 1960s and 1970s. More and more people are remarking that we are running out of new monomers to polymerize, and that the improved polymers of the future will depend heavily on synergistic combinations of existing materials. In the era of the mid-1960s, three distinct multipolymer combinations were recognized: polymer bl...

Polymer blends, grafts, and blocks, broadly defined, encompass all of the ways in which two or more kinds of poly­ mer molecules can be mixed and/or joined. Because these mate­ rials exhibit non-linear and often synergistic properties, they have found increasing application in our technology. Their multifarious uses have, in turn, spurred new research efforts, to find yet different ways of joining two kinds of polymer molecules, with novel phy...

I will plant in the wilderness the cedar the acacia-tree and the myrtle and the oil-tree, I will set in the desert the cypress, the plane-tree and the larch together, That they may see, and know and consider and understand together, That the hand of the Lord hath done this, ... Isaiah, 41:19 and 20 (first portion) The need to improve our utilization of the Earth's natural resources is everyone's business, from every country. This book presents...

For there is hope of a tree, If it be cut down, That it will sprout again And that the tender branch Thereof will not cease. Job XIV (7) Mankind has been blessed with a multitude of resources. In the beginning he utilized almost soley replenishable items such as vegetation and animal protein, for both nourishment and shelter. Gradually, such metals as copper and iron were developed and replaced wood as a material of construction. Cement and gl...