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Cadmium and boron are generally used for thermal-neutron shielding because of their high thermal neutron absorption cross-sections. However, the yields of capture gamma-rays are also large, which are undesirable for medical and biological uses. To overcome this disadvantage, a novel neutron shielding material using a metathesis-polymer matrix has been developed in Japan.
A neutron shielding material using a metathesis-polymer matrix, which is a thermosetting resin, was developed. This shielding material has characteristics that can be controlled for different mixing ratios of neutron absorbers and for formation in the laboratory. Additionally, the elastic modulus can be changed at the hardening process, from a flexible elastoma to a mechanically tough solid.
Yasutomo Kanazawa Japan Local time: 00:09 Native speaker of: Japanese PRO pts in category: 4
Notes to answerer
Asker: I cannot really understand how it is possible to conclude this. The text you provided might also say something like this: an iron-made bar, which is a metal, can be found everywhere. In this sense, these two words are not equivalent.
Reference information: 1. double decomposition reaction - a chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB+CD=AD+CB) double decomposition, metathesis.
To be honest I don't really understand it.
It appears to be a matrix of a polymer plus metathesis - but of course "metathesis" is not a material but rather a process/type of reaction.
I don't agree with "herbalchemist" - "The metathesis polymer matrix is the reaction mixture before thermosetting", the source text states "using a metathesis-polymer matrix" which makes me think it refers to a material rather than a process, afterall, a matrix is a material.
The source seems confusing to me because it combines a material with a process and calls it a material, but I'm really not very sure. I never liked polymer chemistry.
Neil Ashby Spain Specializes in field Native speaker of: English
Note to reference poster
Asker: Thank you! I also found that definition for metathesis. Taking into account the definition of "metathesis", I think "polymer" here refers to "an act of polymerization". What do you think?
Asker: I DO agree with you!!! It is also confusing to me because as you said it combines a material with a process and calls it a material! However, a polymer may also mean a product of polymerization, which in this sense refers to a process like metathesis. Thanks!
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