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Polybutylene Adipate Terephthalate
Abbreviation
PBAT
Names
Poly(butylene adipate-co-terephthalate); Adipic Acid-1,4-butanediol-terephthalic Acid Copolymer
Product #Tags
#biodegradable #biodegradability #sustainability
Insight Articles
#PS519
Main Product
Polybutylene Adipate Terephthalate
Segment
Chemicals
Main-Family
Polymers
Sub-Family
Thermoplastic Polyester
Physical State

Solid

Description

PBAT (short for PolyButylene Adipate Terephthalate) is a biodegradable random Copolymer, specifically a Copolyester of Adipic Acid, 1,4-Butanediol and Terephthalic Acid (from Dimethyl Terephthalate).

It is generally marketed as a fully biodegradable alternative to Low Density Polyethylene, having many similar properties including flexibility and resilience, allowing it to be used for many similar uses such as plastic bags and wraps. It is depicted as a Block Co-polymer here due to the common synthetic method of first synthesizing two Copolymer Blocks and then combining them. However, it is important to note that the actual structure of the Polymer is a Random Co-polymer of the Blocks shown in Fig. 1.

Figure 1 - TBOT* is used to catalyze the Transesterification of the Polyesters of Adipic acid and DMT to generate the Random Copolymer PBAT

*TBOT: Tetrabutoxytitanium

 

Source: Wikipedia, PBAT

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Structure of PBAT https://en.wikipedia.org/wiki/Polybutylene_adipate_terephthalate
  Product Communicator
Title Date
  UserPic Biodegradable PBAT added 9/16/2023
Identifiers
logo CAS Number
60961-73-1
Chemical Data
Chemical Formula

(C8H6O4)m(C6H10O4)n(C4H10O2)(m+n)

Molecular Weight (g/mol)
30000
Melting Point (°C)
120
Sulfur Content (wt%)
0
Specific Gravity
1.21
Crude Data
API Gravity
-14.56
Country
Product Settings
Default
Status
A
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Transaction Name Date
Modified by UserPic   Kokel, Nicolas 6/4/2025 2:16 PM
Added by UserPic   Kokel, Nicolas 9/16/2023 10:47 AM