The impact of microwave-assisted thermal sterilization on the morphology, free volume, and gas barrier properties of multilayer polymeric films

2014 ◽  
Vol 131 (12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Sumeet Dhawan ◽  
Christopher Varney ◽  
Gustavo V. Barbosa-Cánovas ◽  
Juming Tang ◽  
Farida Selim ◽  
...  
Keyword(s):  
Free Volume ◽  
Barrier Properties ◽  
Polymeric Films ◽  
Gas Barrier ◽  
Microwave Assisted ◽  
Thermal Sterilization ◽  
The Impact ◽  
Gas Barrier Properties

scholarly journals Multi-scale analysis of the impact of polylactide morphology on gas barrier properties

Polymer ◽  
2017 ◽  
Vol 108 ◽  
pp. 163-172 ◽  
Author(s):  
Samira Fernandes Nassar ◽  
Alain Guinault ◽  
Nicolas Delpouve ◽  
Véronique Divry ◽  
Violette Ducruet ◽  
...  
Keyword(s):  
Barrier Properties ◽  
Scale Analysis ◽  
Gas Barrier ◽  
Multi Scale ◽  
The Impact ◽  
Multi Scale Analysis ◽  
Gas 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%.

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.

scholarly journals Shelf-life modeling of microwave-assisted thermal sterilized mashed potato in polymeric pouches of different gas barrier properties

2016 ◽  
Vol 183 ◽  
pp. 65-73 ◽  
Author(s):  
Hongchao Zhang ◽  
Zhongwei Tang ◽  
Barbara Rasco ◽  
Juming Tang ◽  
Shyam S. Sablani
Keyword(s):  
Shelf Life ◽  
Barrier Properties ◽  
Gas Barrier ◽  
Microwave Assisted ◽  
Gas Barrier Properties

scholarly journals Impact of Backbone Amide Substitution at the Meta- and Para-Positions on the Gas Barrier Properties of Polyimide

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2097
Author(s):  
Qian Wen ◽  
Ao Tang ◽  
Chengliang Chen ◽  
Yiwu Liu ◽  
Chunguang Xiao ◽  
...  
Keyword(s):  
Transmission Rate ◽  
Barrier Properties ◽  
Polyimide Film ◽  
Flexible Display ◽  
Gas Barrier ◽  
Positron Annihilation Lifetime ◽  
Barrier Materials ◽  
Oxygen Transmission Rate ◽  
Display Technology ◽  
Gas Barrier Properties

This study designed and synthesised a meta-amide-substituted dianiline monomer (m-DABA) as a stereoisomer of DABA, a previously investigated para-amide-substituted dianiline monomer. This new monomer was polymerised with pyromellitic dianhydride (PMDA) to prepare a polyimide film (m-DABPI) in a process similar to that employed in a previous study. The relationship between the substitution positions on the monomer and the gas barrier properties of the polyimide film was investigated via molecular simulation, wide-angle X-ray diffraction (WXRD), and positron annihilation lifetime spectroscopy (PALS) to gain deeper insights into the gas barrier mechanism. The results showed that compared with the para-substituted DABPI, the m-DABPI exhibited better gas barrier properties, with a water vapour transmission rate (WVTR) and an oxygen transmission rate (OTR) as low as 2.8 g·m−2·d−1 and 3.3 cm3·m−2·d−1, respectively. This was because the meta-linked polyimide molecular chains were more tightly packed, leading to a smaller free volume and lower molecular chain mobility. These properties are not conducive to the permeation of small molecules into the film; thus, the gas barrier properties were improved. The findings have significant implications for the structural design of high-barrier materials and could promote the development of flexible display technology.

Tailoring morphology to improve the gas-barrier properties of thermoplastic polyurethane/ethylene-vinyl alcohol blends

2016 ◽  
Vol 56 (8) ◽  
pp. 922-931 ◽  
Author(s):  
Xiumei Gao ◽  
Dekun Sheng ◽  
Xiangdong Liu ◽  
Tongbing Li ◽  
Fance Ji ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Thermoplastic Polyurethane ◽  
Barrier Properties ◽  
Gas Barrier ◽  
Ethylene Vinyl Alcohol ◽  
Gas Barrier Properties
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