..., it ameliorates before anything the rigidity as well as its divisibility) ,
transparent polystyrene (crystal or natural)

for characterisation and separation of polymer solutes in molecular topology. Can google on fractionation of polystyrene

I'm not at all sure about this, nor whether it would fit your specific context.

Polystyrene (High-impact Polystyrene)
Economical
Ease of Processing
Need Heat Score (non-foldable / scorable)
http://unicorngraphics.com/printing/plastic.html

The wing 10 is sweptback and is formed from a
flat sheet of polystyrene foam, or other material of similar
characteristics, i.e., a semi-rigid, scorable material
http://www.patentstorm.us/patents/5908341/description.html

http://www.wipo.int/pctdb/en/wo.jsp?IA=US2003017878&DISPLAY=...

See also these previous questions relating to tablets:
http://www.proz.com/kudoz/french_to_english/medical:_pharmac...
http://www.proz.com/kudoz/english_to_french/marketing_market...

note: by improving the above qualities it actually means that the negative factor inherent in it(the frangibility or breakability) is reduced


Noun 1. breakability - quality of being easily damaged or destroyed
fragility, frangibility, frangibleness
vulnerability - susceptibility to injury or attack

Based on WordNet 3.0, Farlex clipart collection. © 2003-2008 Princeton University, Farlex Inc.

Main Entry: fran·gi·ble
Pronunciation: \ˈfran-jə-bəl\
Function: adjective
Etymology: Middle English, from Middle French & Medieval Latin; Middle French, from Medieval Latin frangibilis, from Latin frangere to break — more at break
Date: 15th century
: readily or easily broken
synonyms see fragile
— fran·gi·bil·i·ty \ˌfran-jə-ˈbi-lə-tē\ noun


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Note added at 22 hrs (2008-09-19 10:01:31 GMT)
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PDF] N ti l li ti f h i d National applications of harmonized European ...File Format: PDF/Adobe Acrobat - View as HTML
Shatter properties – safe breakability. Flexural tensile strength ... improvement of the reaction to fire classification (e.g. an addition of fire ...
www.epaq.org/db/docs/04_Podleschny_071126_national-applicat... - Similar pages
[PDF] &File Format: PDF/Adobe Acrobat - View as HTML
weight of 1000 to 50000 as the value of corresponding polystyrene as the reference.; .... extent to thereby improve breakability upon bending and degree of ...
https://publications.european-patent-office.org/PublicationS... - Similar pages

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Note added at 22 hrs (2008-09-19 10:05:22 GMT)
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Laminate, method for producing the same and tire using the same ...... of 1000 to 100000 as the value of corresponding polystyrene as the reference ; ... improve breakability upon bending and degree of occurrence of cracks. ...
www.freshpatents.com/Laminate-method-for-producing-the-same... - 88k - Cached - Similar pages

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Note added at 22 hrs (2008-09-19 10:07:39 GMT)
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Laminate, method for producing the same and tire using the same ...... of 1000 to 100000 as the value of corresponding polystyrene as the reference ; ... improve breakability upon bending and degree of occurrence of cracks. ...
www.freshpatents.com/Laminate-method-for-producing-the-same... - 88k - Cached - Similar pages

Although "sécable" means divisible, it seems unlikely that any material would be improved by making it more frangible. Toughness is a quality much sought after in materials engineering, and is, in a sense, the opposite of brittleness (and not to be confused with strength or stiffness). Any addition of fibrous material to a brittle one (eg collagen in bone) will make it much tougher.
But this could be completely the wrong translation....

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Note added at 23 hrs (2008-09-19 10:29:37 GMT)
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The "meaning" remains intact (despite the negative inversion) since the required effect is that the material is in some sense "improved". I would never refer to "improved breakability" on account of its ambiguity.
Hardness is certainly an important characteristic of polymers, but not really consistent with the "divisibility" aspect of "sécabilité".