methyl methacrylate grafted rubber (mg rubber)

PST 154

METHYL METHACRYLATE

GRAFTED RUBBER (MG RUBBER)

PRESENT BY…

SYAFIQ + HANIM + SYIDA = GROUP 6

MG Rubber

• Heveaplus MG rubber

2NDARY POLYMER(PMMA)

PRIMARY POLYMER

(NR)MG RUBBERGRAFT

How to accomplish grafting process

1. Activating the NR polymer2. Simultaneously graft3. Co-polymerizing the mma monomer4. NR and monomer added as emulsion5. All reactions take place under uniform colloidal

conditions6. Free radical centre in rubber molecules are form

by the addition of cumene hydroperoxides (CHP) which amines presence act as centre for formation of polymer side chains .

1. Activating the NR polymer2. Simultaneously graft3. Co-polymerizing the mma monomer4. NR and monomer added as emulsion5. All reactions take place under uniform colloidal

conditions6. Free radical centre in rubber molecules are form

by the addition of cumene hydroperoxides (CHP) which amines presence act as centre for formation of polymer side chains .

PRODUCTION OF MG RUBBER

Chemical X

1. PREPARATION OF MONOMER EMULSION

Formula :-• Monomer 2:1 Rubber• ATP 0.25% on rubber• Oleic acid 1% on monomer• Ammonia 0.8% on rubber

Formula :-• Monomer 2:1 Rubber• ATP 0.25% on rubber• Oleic acid 1% on monomer• Ammonia 0.8% on rubber

2. REACTION / CO-POLYMERISATION

AFL AFL+ MMA

AFL+MMA+ AMINEAFL + MMA

Monomer (MMA)

emulsionTEP

amineStir 25 min

Speed:45-60 rpm

Stop stirrer Thoroughly mix

Left overnightTANK A

DISPERSION OF ANTIOXIDANT (Nonox EXN)

H2O

NONOX EXN

AMMONIUM OLEATE

TANK B

TANK A TANK B

GRAFTED

LATEX

3. COAGULATION AND MILLING

H2O H2O H20+FORMIC ACID

H20+FORMIC ACID+REACTED

LATEXSERUM+H2O

COAGULUM

Formic acid

Boil 2 hours

Reacted latex

Drained off

READY FOR

MILLING

100`C

3. COAGULATION AND MILLING

Reacted latex

Reacted latex

LATEX+ SULPHURIC

ACID

LATEX+ SULPHURIC

ACIDSERUM+H2O

COAGULUM

Sulphuric acid

STIR (rake type) 2 hours

Drained off

Flood coagulum 3-4 time with H2O

to remove residual acid

AL coagulation tank

4. TROUBLE SHOOTING

• Discoloration problem of MG 30 grade1. add more coagulation acid than 10% strength

overcome:controlled addition sulphric acid ( original colour restored )

2. Higher drying temperature

HOW TO OVERCOME

1. Do not change the source of the latex2. The dry weight should be determined as

accurately as possible3. Weight all the chemicals accurately4. Strict control over the stirrer speed, rpm,

agitation time

GENERAL PROPERTIES OF MG RUBBER

• Reflecting the properties of both NR and plastic component

1.As a solid polymer• used as self-reinforcing or reinforcing agent for

addition to normal rubber, compatible in all properties.

2.As an adhesive• MG solution and MG latex used to bond natural or

synthetic rubber to PVC, synthetic fibre, leather and other rubbers.

• Reflecting the properties of both NR and plastic component

1.As a solid polymer• used as self-reinforcing or reinforcing agent for

addition to normal rubber, compatible in all properties.

2.As an adhesive• MG solution and MG latex used to bond natural or

synthetic rubber to PVC, synthetic fibre, leather and other rubbers.

THE END