Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 14 of 14 for “"emulsion polymerisation"”.
-
Scale-up in emulsion polymerisation
… procedure for successful scale-up of batchwise emulsion polymerisation has been studied. The relevant literature on liquid-liquid dispersion on scale-up and on emulsion polymerisation has been crit1cally reviewed. Batchwise emulsion polymerisation of styrene in a specially built 3 litre, …
-
Aspects of Suspension & Emulsion Polymerisation
Suspension polymerisation involves a dynamic equilibrium between monomer break up and coalescence.<br/><br/>A water soluble polymer (the suspending agent) is added to the aqueous phase to stabilise the monomer drop form during its conversion to a solid reaction product. Depending on the type and …
-
Comprehensive Study of Semicontinuous Emulsion Polymerisation Processes for Producing Nanoparticles
Semicontinuous emulsion polymerisation offers flexibility and versatility for manufacturing colloids for a wide range of applications. The technique has been studied since 1950s, however, its importance has only recently realized as evidenced by increasing attentions it has received in recent …
-
Synthesis and performance of novel azo initiators with special reference to emulsion polymerisation
… initiators for different modes of free-radical polymerisation and also as stabilisers for emulsion polymerisation reactions carried out in the absence of added conventional surfactant. During the preparation of the above compounds, it was discovered that 4,4'-azobis-4-cyanopentanoyl chloride …
-
Mathematical modelling in batch emulsion polymerization
Emulsion polymerisation, suspension polymerisation and the dispersion processes of styrene in water have been carried out at 50°C in a stainless steel, stirred batch reactor of 3.63 dam capacity. The reactor was fitted with a temperature control facility and could be operated with or without …
-
Mechanical reinforcement of films from rubber latices by added polymer particles
… added polymer particles prepared as latices by emulsion polymerisation to reinforce the mechanical properties of films derived from rubber latices, particularly post-vulcanised natural rubber latex, have been investigated. The emphasis has been upon the enhancement of tear strength and puncture …
-
Modification of a commercial poly (VDF-co-HFP) copolymer latex
… film. This can be achieved by graft copolymerisation or core shell emulsion polymerisation. These methods are used to funcionalise the polymer chains, while maintaining the desirable properties of the parent polymer. Due to environmental regulations, industry focus has shifted towards …
-
Dispersionen für den Korrosionsschutz von Aluminium
… on technical aluminium. By means of a two-step emulsion polymerisation with phosphate substituted monomer we obtain polymeric nano-particles with phosphate groups on the surface. In a first step cross-linked butyl acrylate/styrene particles were formed. In a second step a mixture of …
-
Co-polymer microgels: contemporary physico-chemical, structural and analytical investigations
… be altered by modification of the system by co-polymerisation. A series of colloidal microgels have been prepared by surfactant-free emulsion polymerisation (SFEP) based on the NIPAM monomer. Butyl acrylate (BuAc) has been used as a co-monomer in order to alter the physico-chemical properties of …
-
Colloidal microgels: synthesis, characterisation and applications
… have been synthesized by a surfactant-free emulsion polymerisation (SFEP) technique, which are: (i) poly (NIPAM) based homo-polymer, (ii) poly (NIPAM) based co-polymer, (iii) hydrophobically modified homo-polymer and (iv) hydrophobically modified co-polymer microgels. Poly (NIPAM) based …
-
The development of novel smart wound dressings based on colloidal microgels and cotton fabric
… have been prepared by a surfactant free emulsion polymerisation based on an N-isopropylacrylamide (NIPAM) monomer. Poly(NIPAM) is a thermo sensitive polymer which undergoes a conformational transition close to the human skin temperature. Poly(NIPAM) was co-polymerized with hydrophobic …
-
Colloidal microgels as (trans)dermal drug delivery systems
… and propyl paraben (PP), by a surfactant-free emulsion polymerisation (SFEP) in water. Physico-chemical properties of the microgels were determined using different techniques including photon correlation spectroscopy (PCS), transmission electron microscopy (TEM), nuclear magnetic resonance (NMR …
-
Streuexperimente an konzentrierten Dispersionen
… polydispersity are prepared by the technique of emulsion copolymerisation. The solid like structures were prepared in a Couette or disc shear cell. The uniform crystal ordering was achieved by shearing. By the method of small angle scattering of X-rays the vectors of scattering were obtained. …