Memorial Tributes Volume 14 (2011) / Chapter Skim
Currently Skimming:
ROGER P. KAMBOUR
ROGER P. KAMBOUR
Pages 160-165
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 161... ...
WARD ROGER KAMBOUR was a chemist at the General Electric Research and Development Center and a research professor at the University of Massachusetts. His pioneering work on crazing and fracture of glasslike thermoplastics laid the foundations for our current understanding of fracture resistance in rigid polymers.
|
From page 162... ...
However, his doubts were dispelled within 12 months, first by news that Spurr and Niegisch had observed solid matter inside crazes, which meant that they were not true cracks, and then by his own definitive experiments, which demonstrated that crazes are porous, load-bearing structures. By measuring the critical angle for total internal reflection from alcohol-induced crazes formed in polycarbonate under tensile stress, Roger was able to show that they consisted of 50 percent polymer and 50 percent ethanol, by volume.
|
From page 163... ...
On reading Roger's 1964 article on the subject, researchers in England looked for evidence of crazing in rubber-toughened polystyrene and showed that large numbers of crazes form around a loaded crack tip in this commercially important class of polymer blends, thereby explaining how adding 8 percent rubber could transform brittle PS into the "high-impact" grade known as HIPS and opening up the whole subject of toughening mechanisms in polymer blends. The formation of craze fibrils also helped explain why chain length (and therefore molecular weight)
|
From page 164... ...
, and a passionate supporter of Amherst College. He was a skillful downhill skier who took his turn in the Hickory Hill Ski Patrol in New York State during the 1980s.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.