Abstract
LLDPE is a less crystalline polymer with vast industrial and domestic applications. It is imperative to understand the synthesis, processing conditions, and thermal degradation mechanism of the co- as well as terpolymers. This paper reports the in-situ synthesis and thermal degradation studies of the ethylene-propylene copolymer and ethylene-propylene-1-hexene terpolymer and its nanocomposite with ZnAL LDH sheets. The 1-hexene dosing during the in-situ process influenced the product yield and immensely affected the thermal stability of the resultant polymer. One milliliter 1-hexene in-situ addition increased the product yield by 170 percent, while the temperature at 10 percent weight loss in TGA was dropped by about 60 °C. While only 0.3 weight percent ZnAL LDH addition in the terpolymer improved the thermal stability by 10 °C. A master plot technique and combined kinetics analysis (CKA) were deployed to access the thermal degradation mechanism of the synthesized polymers.
Highlights
The polymerization of ethylene and ethylene with α-olefins using a class of metallocene catalysts delivers very high catalytic activity and precise control over the stereoregular properties of the resultant polymer [1]
Graphene [11,12], hexagonal boron nitride [2], titania [13], and layered double hydroxides (LDHs) [12,14], etc., are a few classes of 2D nanomaterial being extensively used in the synthesis of the polymer nanocomposites
This paper reports the synthesis and thermal degradation kinetics studies of the α-olefin copolymer, terpolymer, and terpolymer/LDH nanocomposite
Summary
The polymerization of ethylene and ethylene with α-olefins using a class of metallocene catalysts delivers very high catalytic activity and precise control over the stereoregular properties of the resultant polymer [1]. It is desired to synthesize polyolefin with improved thermal stability [3], mechanical properties, decreased flammability [4], and gas permeability [5] The properties of these polymers can be further improved by the incorporation of nanomaterials in the polymer matrices to form a polymer nanocomposite. Graphene [11,12], hexagonal boron nitride (hBN) [2], titania [13], and layered double hydroxides (LDHs) [12,14], etc., are a few classes of 2D nanomaterial being extensively used in the synthesis of the polymer nanocomposites These nanomaterials inherent novel properties such as mechanical, chemical, thermal, optical properties, etc., attributes these materials could contribute to the staggering properties of the resulting polymer nanocomposites. Despite the advances of the polyolefins/LDH nanocomposites, it is crucial to investigate the thermal stability and degradation kinetics of this material for high-temperature applications. The master plot technique and combined-kinetic analysis (CKA) were employed to predict the most suitable degradation kinetic model
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