The excellent gas barrier properties and unique mechanical properties of poly(propylene carbonate)/organo-montmorillonite nanocomposites

2017 ◽  
Vol 74 (12) ◽  
pp. 5065-5082 ◽  
Author(s):  
Junjun Kong ◽  
Zonglin Li ◽  
Zenwen Cao ◽  
Changyu Han ◽  
Lisong Dong
Keyword(s):  
Mechanical Properties ◽  
Propylene Carbonate ◽  
Barrier Properties ◽  
Gas Barrier ◽  
Poly Propylene ◽  
Gas Barrier Properties ◽  
Montmorillonite Nanocomposites

Poly(propylene carbonate)/aluminum flake composite films with enhanced gas barrier properties

2014 ◽  
pp. n/a-n/a ◽  
Author(s):  
Lipeng Zhai ◽  
Gaofeng Li ◽  
Yan Xu ◽  
Min Xiao ◽  
Shuanjin Wang ◽  
...  
Keyword(s):  
Propylene Carbonate ◽  
Composite Films ◽  
Barrier Properties ◽  
Gas Barrier ◽  
Aluminum Flake ◽  
Poly Propylene ◽  
Gas Barrier Properties

scholarly journals Block Copolyesters Containing 2,5-Furan and trans-1,4-Cyclohexane Subunits with Outstanding Gas Barrier Properties

2019 ◽  
Vol 20 (9) ◽  
pp. 2187 ◽  
Author(s):  
Giulia Guidotti ◽  
Laura Genovese ◽  
Michelina Soccio ◽  
Matteo Gigli ◽  
Andrea Munari ◽  
...  
Keyword(s):  
Fossil Fuels ◽  
Random Copolymer ◽  
Barrier Properties ◽  
Reactive Blending ◽  
Gas Barrier ◽  
Low Elastic Modulus ◽  
High Elongation ◽  
Copolymer Structure ◽  
Poly Propylene ◽  
Gas Barrier Properties

Biopolymers are gaining increasing importance as substitutes for plastics derived from fossil fuels, especially for packaging applications. In particular, furanoate-based polyesters appear as the most credible alternative due to their intriguing physic/mechanical and gas barrier properties. In this study, block copolyesters containing 2,5-furan and trans-1,4-cyclohexane moieties were synthesized by reactive blending, starting from the two parent homopolymers: poly(propylene furanoate) (PPF) and poly(propylene cyclohexanedicarboxylate) (PPCE). The whole range of molecular architectures, from long block to random copolymer with a fixed molar composition (1:1 of the two repeating units) was considered. Molecular, thermal, tensile, and gas barrier properties of the prepared materials were investigated and correlated to the copolymer structure. A strict dependence of the functional properties on the copolymers’ block length was found. In particular, short block copolymers, thanks to the introduction of more flexible cyclohexane-containing co-units, displayed high elongation at break and low elastic modulus, thus overcoming PPF’s intrinsic rigidity. Furthermore, the exceptionally low gas permeabilities of PPF were further improved due to the concomitant action of the two rings, both capable of acting as mesogenic groups in the presence of flexible aliphatic units, and thus responsible for the formation of 1D/2D ordered domains, which in turn impart outstanding barrier properties.

Synthesis and Properties of a Novel Si-Ti Polymer/Montmorillonite Nanocomposites

2014 ◽  
Vol 636 ◽  
pp. 85-88
Author(s):  
Xin Hua Yuan ◽  
Li Yin Han ◽  
Qiu Su ◽  
Wen Hua Guo ◽  
Hong Xing Xu ◽  
...  
Keyword(s):  
Impact Strength ◽  
Raw Materials ◽  
Barrier Properties ◽  
Tetrabutyl Titanate ◽  
Gas Barrier ◽  
Impact Properties ◽  
Barrier Performance ◽  
The Impact ◽  
Gas Barrier Properties ◽  
Montmorillonite Nanocomposites

Using methyl triethoxysilane, tetrabutyl titanate and ethyl acetoacetate as raw materials, the Si-Ti polymer was synthesized to prepare Si-Ti polymer/montmorillonite nanocomposites. The effects of OMMT content on the impact properties and barrier performance of nanocomposites were investigated. The results show that with the increasing of OMMT content, the impact properties of nanocomposites are improved significantly. The impact strength of nanocomposite with 10wt% OMMT is about twice times than that without OMMT. The gas barrier properties of nanocomposites are also improved significantly. Compared with pure Si-Ti polymer, the water absorption of nanocomposite with 6wt% OMMT is decreased by 60.3%.

scholarly journals Relationship Between Crystallization, Mechanical and Gas Barrier Properties of Poly(ethylene furanoate) (PEF) in Multinanolayered PLA-PEF and PET-PEF Films

2021 ◽  
Author(s):  
Alain Guinault ◽  
Tiphaine Messin ◽  
Gilbert Anderer ◽  
Stefan Krawielitzki ◽  
Cyrille Sollogoub ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide Emissions ◽  
Food Packaging ◽  
Barrier Properties ◽  
Industrial Applications ◽  
High Price ◽  
Gas Barrier ◽  
Ecological Requirements ◽  
Poly Ethylene ◽  
Gas Barrier Properties

Food packaging films must be reinvented in order to answer the new demanding ecological requirements. Biobased and/or biodegradable polymers appear as an interesting alternative to reduce petroleum dependence and carbon dioxide emissions. Poly(ethylene furanoate) (PEF) appears today as a new promising biopolymer thanks to its good gas barrier and mechanical properties, despite its high price that could limit its industrial applications. Its combination with other polymers is thus of great interest and for the first time, film coextrusion process is used to create PLA-PEF and PET-PEF multi-micro/nano layered films. A new PEF grade developed by AVA Biochem in the H2020 Mypack program, has been used and firstly analysed in terms of melt processability, mechanical, thermal and gas barrier properties. Our major results confirmed the good gas barrier as well as mechanical properties of amorphous PEF. Post-extrusion PEF bulk thermal crystallization led to very brittle material making gas barrier measurements impossible. Micro/nanolayered PLA-PEF and PET-PEF films with different PEF layer thicknesses have been processed and post-extrusion annealing treatment was carried out. The relationship between crystallinity, mechanical and gas barrier properties will be investigated.

Influence of asymmetric substituent group 2-methyl-1,3-propanediol on bio-based poly(propylene furandicarboxylate) copolyesters

Soft Matter ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 402-410 ◽  
Author(s):  
Zhi-Yu Yang ◽  
Chin-Wen Chen ◽  
Syang-Peng Rwei
Keyword(s):  
Free Volume ◽  
Molecular Motion ◽  
Barrier Properties ◽  
Small Scale ◽  
Gas Barrier ◽  
Methyl Group ◽  
Substituent Group ◽  
Group 2 ◽  
Poly Propylene ◽  
Gas Barrier Properties

The effect of the pendant methyl group weakens gas barrier properties owing to small-scale molecular motion and an increase of free volume. These novel copolyesters have great potential for packing-related applications.

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