PEEK can be modified either by the addition of functionalized monomers (prepolymerization) or post-polymerization modifications by chemical processes such as sulphonation
, amination and nitration.
In the sulphonation
division, due to unrest in the main export market, NDC worked to open new markets in the Americas and achieved good product acceptance.
In our previous studies, the bioactivity of PEEK was increased via sulphonation
and deposition of HA crystalline particles on the sulphonated layer [11, 12].
Reactive dyes are highly water soluble due to high degree of sulphonation
and non degradable in typical aerobic conditions found in conventional biological treatment systems (2).
In order to improve the potential of [beta]-glucans various derivation protocols used are; sulphonation
, carboxymethylation, phosphation etc.
Additionally, the Golgi apparatus follows ER in subsequent APP adjustment (O- and N-glycosylation, phosphorylation, and sulphonation
Another interesting area of work is increasing the degree of sulphonation
of SPEEK and thereby making it more hydrophilic and also water soluble.
Determination of sulphonated compounds content, characteristic of sulphonation
, sorption studies," Cement and Concrete Research, vol.
The modification of surface of rubber powder/reclaim rubber by sulphonation
, monomer grafting [21-23] and oxidation [24-26] was also attempted.
To further enhance its product offering, the group recently commissioned its sulphonation
unit at Pithampur (Madhya Pradesh) to manufacture of 7500 tonnes of surfactants per annum.