The method is widely used for the synthesis of star shaped polystyrene with divinyl benzene with low molecular weight distributions.
3.
Chemically, it is a synthetic polymer of polyacrylic acid cross-linked with divinyl glycol, with calcium as a counter-ion.
4.
Allyls, acrylates and styrenics contain vinyl groups . ( A styrenic crosslinker with two vinyl groups is called " divinyl benzene " .)
5.
These oligotrophic organisms are abundant in nutrient poor tropical waters and use a unique photosynthetic pigment, divinyl-chlorophyll, to absorb light and acquire energy.
6.
The third route is through the addition of small amounts of cross linking agents to the polymeric precursor ( for example, addition of divinyl benzene to polystyryl lithium ).
7.
Shown below are key steps in the syntheses of Trichodiene and Nor-Sterepolide, the latter of which is thought to proceed via an unusual alkyne-allene isomerization that generates the divinyl ketone.
8.
A different representation : polyacrylic acid residues are shown in red, residues of the cross-linker divinyl glycol ( 3, 4-dihydroxy-1, 5-hexadiene ) in blue.
9.
For example, the amount of divinyl benzene added in the above pathway, compared to the number of active chains, is a key factor governing the overall degree of branching of the polymer.
10.
Even in an article in 1938 on cross-linking copolymerization of acrylic acid with divinyl he laid the foundation for the core technology of today as " superabsorbent " designated products, for example in diapers are widely used.
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