Microwave assisted HMDSO/oxygen plasma coated polyethylene terephthalate films: Effects of process parameters and uniaxial strain on gas barrier properties, surface morphology, and chemical composition

2005 ◽  
Vol 99 (4) ◽  
pp. 1485-1495 ◽  
Author(s):  
Ernst Schmachtenberg ◽  
Francis Reny Costa ◽  
Sebastian Göbel
Keyword(s):  
Chemical Composition ◽  
Surface Morphology ◽  
Polyethylene Terephthalate ◽  
Process Parameters ◽  
Oxygen Plasma ◽  
Barrier Properties ◽  
Uniaxial Strain ◽  
Gas Barrier ◽  
Microwave Assisted ◽  
Gas Barrier Properties

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 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.

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