PET PPT
description
Transcript of PET PPT
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• Kegiatan Produksi
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Diagram Blok Proses Pembuatan PTA
OxidationCrystalli-
zationSeparation Drying
Hydroge-
nation
Crystalli-
zationSeparation Drying
PX, HAc,
Catalyst
Oxygen
Crude TPA
(CTA)
Purified TPA
(PTA)
CTA Plant (Oksidasi)
PTA Plant (Pemurnian)
Water Hydrogen
Mixing
Slurry
Preparation
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MixingEsterifi-
cation
Polyconden-
sationPelletizing
DryingPre-
heatingPolycondensation Cooling
TPA&IPA
EG
AdditiveCatalyst,
Additive
MSP PET
(Amorphous)
SSP PET
(Crystalline))
MSP Plant (Melt State Polycondensation)
SSP Plant (Solid State Polycondensation)
Diagram Blok Proses Pembuatan PET
Crystalli zation
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TINJAUAN PUSTAKA
PETMerupakan polimer sintetis dari jenis poliester yang dibuat melalui reaksi polimerisasi PTA (purified terephtalic acid) dan Etilen Glikol.
C
O
HO
O
OH
H2C
H2C OHHO
terephthalic acid
C
O
HO
O
OH2C
Etilen Glikol
H2C OH
+ H2O
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BAHAN BAKU PET
• Purified Terepthalic Acid (PTA)• Isophtalic Acid (IPA)• Etilena Glikol (EG)• Antimony Trioksida
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PROSES PEMBUATAN PET
1. Esterification reaction (without catalyst, under pressure)HOOC-C6H4-COOH + 2 HO-CH2CH2-OH
TEREPHTALIC ACID + ETHYLENE GLYCOL
HOCH2CH2OOC-C6H4-COOCH2CH2OH + H2OBIS(2-HYDROXYETHYL)TEREPHTALATE + WATER
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Mekanisme Reaksi Esterifikasi
H2C
H2C OHHO
C
O
HO
O
OH2C
Etilen Glikol
H2C OH
H2O
Reaksi Esterifikasi
C
O
HO
OH
O
OH
H2C
H2C OH
H
C
O
HO
O
OH2
H2C
H2C OH
C
O
O
O
OH2C
H2C OH
+ H2O
H2C
H2CHO
4-((2-hydroxyethoxy)carbonyl)benzoic acid
C
O
HO
O
OH
H+/asetatC
O
HO
OH
OH
bis(2-hydroxyethyl) terephthalate
OH
C
O
HO
OH
OH2C
H2C OH
-H+
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C
O
O
O
OH2C
H2C OH
H2C
H2CHO
C
O
O
O
OH2C
H2C OH
H2CH2C
H+/asetatC
O
O
OH
OH2C
H2C OH
H2C
H2CHO
C
O
O
O
OH2C
H2C OH
H2C
H2COC
O
O
OH
OH2C
H2C OH
H2C
H2CHO
H
Mekanisme Reaksi Polikondensasi PET
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C
O
O
O
OH2C
H2C OH
H2C
H2COC
O
O
OH
OH2C
H2C OH
H2C
H2CHO
H
C
O
O
O
OH2C
H2C OH
H2C
H2COC
O
O
OH
H2C
H2CHO
H2C
H2C OH
transfer proton
HO
Etilen Glikol
-H+
C
O
O
O
OH2C
H2C OH
H2C
H2COC
O
O
O
H2C
CH2HO
C
O
O
O
OH2C
H2C
n
PET
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2. Polycondensation reaction (with catalyst, under vacuum) HOCH2CH2OOC-C6H4-COOCH2CH2OH
BIS(2-HYDROXYETHYL)TEREPHTALATE
HO-(CH2CH2OOC-C6H4-COO)n-CH2CH2OH + HO-CH2CH2-OH POLYETHYLENE TEREPHTALATE ETHYLENE GLYCOL
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Sifat Kimia, dan Sifat Fisika• Tahan terhadap :
– Asam dan basa lemah– Minyak– Hidrokarbon alifatik– Hidrokarbon aromatik spt CCl4
• Mempunyai sifat mekanis yg baik– Tahan terhadap tekanan sampai >100 Psi
• Mempunyai sifat termoplastis yg kuat• Tidak tahan terhadap asam dan basa kuat• Mengalami hidrolisis didalam air yg dipanaskan• Adanya uap air didalam resin PET dapat mengakibatkan resin
terhidrolisis sehingga rantai-rantai polimernya putus dan melepaskan gugus karboksi
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Struktur
OH2CH2C O
CC
O O
O
n
Struktur Monomer Polyethylene Terepthalate (PET)
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