The document discusses the differences between anionic and cationic polymerization. Anionic polymerization involves the polymerization of vinyl monomers with strongly electronegative groups. Cationic photoinitiators are also called photo-acid generators and initiate cationic polymerization through the formation of a carbocation intermediate. Both anionic and cationic polymerization are used to produce polymers with controlled properties for various applications such as adhesives, coatings, elastomers, and synthetic rubber.

1. UV CURING :
ANIONIC VS CATIONIC
PHOTO-POLYMERIZATION
CATIONIC PHOTO-INITIATORS ARE ALSO CALLED
PHOTO-ACID GENERATORS
ANIONIC POLYMERIZATION INVOLVES THE
POLYMERIZATION OF VINYL MONOMERS POSSESSING
STRONG ELECTRONEGATIVE GROUPS.
Sugeng Endarsiwi_2023

2. •BRIEFLY INFO ABOUT ULTRAVIOLET CURING
•ULTRAVIOLET (UV) CURING COATING, INITIALLY PIONEERED BY GERMANY IN THE LATE 1960S, REPRESENTS A NOVEL AND
ENVIRONMENTALLY FRIENDLY COATING. THIS COATING BOASTS SEVERAL ADVANTAGES, INCLUDING HIGH EFFICIENCY, ENERGY
CONSERVATION, LACK OF POLLUTION, RAPID FILM FORMATION, AND OUTSTANDING COATING PERFORMANCE, LEADING TO ITS
SWIFT DEVELOPMENT.
•WHAT ARE THE DIFFERENCES BETWEEN ANIONIC AND CATIONIC POLYMERIZATION?
•ANIONIC POLYMERIZATION AND CATIONIC POLYMERIZATION ARE TWO TYPES OF CHAIN GROWTH POLYMERIZATION REACTIONS
THAT ARE USED FOR SYNTHESIZING DIFFERENT TYPES OF POLYMERS.
•ALTHOUGH BOTH REACTIONS HAVE THE SAME MECHANISM, THERE ARE SEVERAL DIFFERENCES BETWEEN THE TWO.

3. •DEFINITION
•ANIONIC POLYMERIZATION REFERS TO A TYPE OF
POLYMERIZATION PROCESS THAT IS DEPENDENT ON THE
REACTIVITY OF ANIONS TO INITIATE AND PROPAGATE THE
POLYMERIZATION REACTION.
•CATIONIC POLYMERIZATION REFERS TO A TYPE OF CHAIN
GROWTH POLYMERIZATION MECHANISM IN WHICH THE
FORMATION OF A CARBOCATION INTERMEDIATE INITIATES
THE POLYMERIZATION REACTION.

4. •POLYMERIZATION IS A CHEMICAL PROCESS IN WHICH SMALL MOLECULES
CALLED MONOMERS REACT WITH EACH OTHER TO FORM LONG CHAINS OR
NETWORKS KNOWN AS POLYMERS.
•THIS REACTION OCCURS THROUGH THE BONDING OF MONOMERS, WHICH
CREATE REPEATING UNITS THAT MAKE UP THE POLYMER STRUCTURE.
•CATIONIC AND ANIONIC POLYMERIZATION ARE TWO TYPES OF
POLYMERIZATION.

5. •CATIONIC POLYMERIZATION HAS A WIDE RANGE OF USES. THIS PROCESS
CAN BE USED TO PRODUCE POLYMERS WITH CONTROLLED MOLECULAR
WEIGHT, NARROW POLYDISPERSITY, AND UNIQUE ARCHITECTURES. THESE
CHARACTERISTICS HELP IN THE DEVELOPMENT OF ADVANCED MATERIALS
SUCH AS ADHESIVES, COATINGS, AND PHOTORESISTS.
•CATIONIC POLYMERIZATION CAN BE USED IN THE PRODUCTION OF
ELASTOMERS, WHICH ARE MATERIALS THAT EXHIBIT HIGH ELASTICITY AND
RESILIENCE.
•THESE CAN BE USED IN APPLICATIONS SUCH AS GASKETS, SEALS, AND
TIRES

6. THERE ARE MANY
APPLICATIONS OF ANIONIC
POLYMERIZATION. IT ALSO
HELPS TO PRODUCE BLOCK
COPOLYMERS. ANOTHER
APPLICATION OF ANIONIC
POLYMERIZATION IS THE
PRODUCTION OF SYNTHETIC
RUBBER. PROPERTIES OF
RUBBER, SUCH AS
ELASTOMERIC PROPERTIES,
MAKE THEM USEFUL IN THE
MAKING OF APPLICATIONS
SUCH AS TIRES, SEALS, AND
GASKETS.
ANIONIC POLYMERIZATION
ENABLES THE CREATION OF
ELASTOMERS WITH EXCELLENT
MECHANICAL PROPERTIES
SUCH AS HIGH ELASTICITY,
LOW GLASS TRANSITION
TEMPERATURES, AND
RESISTANCE TO HEAT AND
CHEMICALS.
ANOTHER USE OF ANIONIC
POLYMERIZATION IS IN THE
DEVELOPMENT OF
FUNCTIONAL POLYMERS. IT
ALSO HELPS IN THE
FABRICATION OF VARIOUS
NANOMATERIALS.

7. •A POLYMER COATING IS A THIN LAYERED COATING OR PAINT MADE WITH POLYMERS THAT PROVIDE SUPERIOR
ADHERENCE AND PROTECTION FROM CORROSION. A POLYMER IS A MOLECULE MADE BY JOINING TOGETHER
MANY SMALL MOLECULES CALLED MONOMERS THAT ARE MADE UP OF A LARGE NUMBER OF SIMILAR UNITS.

8. Source:
1. https://longchangchemical.com/comparison-of-uv-free-radical-and-cationic-curing/
2. https://polymerinnovationblog.com/uv-curing-part-five-cationic-photopolymerization
3. https://pediaa.com/what-is-the-difference-between-cationic-and-anionic-polymerization/
4. https://www.aatbio.com/resources/faq-frequently-asked-questions/what-are-the-differences-
between-anionic-and-cationic-polymerization
5. https://www.gellnerindustrial.com/blog/cationic-vs-anionic-polymers/