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- Bulk_polymerization abstract "Bulk polymerization or mass polymerization is carried out by adding a soluble initiator to pure monomer in liquid state. The initiator should dissolve in the monomer. The reaction is initiated by heating or exposing to radiation. As the reaction proceeds the mixture becomes more viscous. The reaction is exothermic and a wide range of molecular masses are produced.Bulk polymerization is carried out in the absence of any solvent or dispersant and is thus the simplest in terms of formulation. It is used for most step-growth polymers and many types of chain-growth polymers. In the case of chain-growth reactions, which are generally exothermic, the heat evolved may cause the reaction to become too vigorous and difficult to control unless efficient cooling...Bulk polymerization has several advantages over other methods, these advantages are[citation needed]: The system is simple and requires thermal insulation. The polymer obtained is pure. Large castings may be prepared directly. Molecular weight distribution can be easily changed with the use of a chain transfer agent. The product obtained has high optical clarityDisadvantages[citation needed]: Heat transfer and mixing become difficult as the viscosity of reaction mass increases. The problem of heat transfer is compounded by the highly exothermic nature of free radical addition polymerization. The polymerization is obtained with a broad molecular weight distribution due to the high viscosity and lack of good heat transfer. Very low molecular weights are obtained.fr:Procédé de polymérisation#Polymérisation en masse".
- Bulk_polymerization wikiPageID "24679482".
- Bulk_polymerization wikiPageRevisionID "588103709".
- Bulk_polymerization hasPhotoCollection Bulk_polymerization.
- Bulk_polymerization subject Category:Polymerization_reactions.
- Bulk_polymerization type ChemicalProcess113446390.
- Bulk_polymerization type ChemicalReaction113447361.
- Bulk_polymerization type NaturalProcess113518963.
- Bulk_polymerization type PhysicalEntity100001930.
- Bulk_polymerization type PolymerizationReactions.
- Bulk_polymerization type Process100029677.
- Bulk_polymerization comment "Bulk polymerization or mass polymerization is carried out by adding a soluble initiator to pure monomer in liquid state. The initiator should dissolve in the monomer. The reaction is initiated by heating or exposing to radiation. As the reaction proceeds the mixture becomes more viscous. The reaction is exothermic and a wide range of molecular masses are produced.Bulk polymerization is carried out in the absence of any solvent or dispersant and is thus the simplest in terms of formulation.".
- Bulk_polymerization label "Bulk polymerization".
- Bulk_polymerization label "Substanzpolymerisation".
- Bulk_polymerization label "塊状重合".
- Bulk_polymerization sameAs Substanzpolymerisation.
- Bulk_polymerization sameAs 塊状重合.
- Bulk_polymerization sameAs m.080g9b0.
- Bulk_polymerization sameAs Q6137196.
- Bulk_polymerization sameAs Q6137196.
- Bulk_polymerization sameAs Bulk_polymerization.
- Bulk_polymerization wasDerivedFrom Bulk_polymerization?oldid=588103709.
- Bulk_polymerization isPrimaryTopicOf Bulk_polymerization.