methyl methacrylate grafted rubber (mg rubber)

15
PST 154 METHYL METHACRYLATE GRAFTED RUBBER (MG RUBBER) PRESENT BY… SYAFIQ + HANIM + SYIDA = GROUP 6

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Page 1: Methyl Methacrylate Grafted Rubber (Mg Rubber)

PST 154

METHYL METHACRYLATE

GRAFTED RUBBER (MG RUBBER)

PRESENT BY…

SYAFIQ + HANIM + SYIDA = GROUP 6

Page 2: Methyl Methacrylate Grafted Rubber (Mg Rubber)

MG Rubber

• Heveaplus MG rubber

2NDARY POLYMER(PMMA)

PRIMARY POLYMER

(NR)MG RUBBERGRAFT

Page 3: Methyl Methacrylate Grafted Rubber (Mg Rubber)

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 .

Page 4: Methyl Methacrylate Grafted Rubber (Mg Rubber)

PRODUCTION OF MG RUBBER

Page 5: Methyl Methacrylate Grafted Rubber (Mg Rubber)

Chemical X

Page 6: Methyl Methacrylate Grafted Rubber (Mg Rubber)

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

Page 7: Methyl Methacrylate Grafted Rubber (Mg 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

Page 8: Methyl Methacrylate Grafted Rubber (Mg Rubber)

DISPERSION OF ANTIOXIDANT (Nonox EXN)

H2O

NONOX EXN

AMMONIUM OLEATE

TANK B

TANK A TANK B

GRAFTED

LATEX

Page 9: Methyl Methacrylate Grafted Rubber (Mg Rubber)

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

Page 10: Methyl Methacrylate Grafted Rubber (Mg Rubber)

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

Page 11: Methyl Methacrylate Grafted Rubber (Mg Rubber)

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

Page 12: Methyl Methacrylate Grafted Rubber (Mg Rubber)

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

Page 13: Methyl Methacrylate Grafted Rubber (Mg Rubber)

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.

Page 14: Methyl Methacrylate Grafted Rubber (Mg Rubber)
Page 15: Methyl Methacrylate Grafted Rubber (Mg Rubber)

THE END