In situ solution polymerization for preparation of MDI-modified graphene/hyperbranched poly(ether imide) nanocomposites and their properties

RSC Advances ◽  
2016 ◽  
Vol 6 (1) ◽  
pp. 716-729 ◽  
Author(s):  
Quantao Li ◽  
Wenqiu Chen ◽  
Wei Yan ◽  
Quanyuan Zhang ◽  
Changfeng Yi ◽  
...  
Keyword(s):  
Barrier Properties ◽  
Solution Polymerization ◽  
Gas Barrier ◽  
Hyperbranched Poly ◽  
Thermal Imidization ◽  
Modified Graphene ◽  
Gas Barrier Properties

Two kinds of (GE-MDI/HBPEI) nanocomposites with highly enhanced thermal, mechanical and gas barrier properties, were prepared via in situ solution polymerization, as well as subsequent synchronous thermal imidization and reduction.

Poly(meth)acrylate nanocomposite membranes containing in situ exfoliated graphene platelets: Synthesis, characterization and gas barrier properties

2017 ◽  
Vol 94 ◽  
pp. 431-445 ◽  
Author(s):  
Lenka Poláková ◽  
Zdeňka Sedláková ◽  
Petra Ecorchard ◽  
Ewa Pavlova ◽  
Jakub Peter ◽  
...  
Keyword(s):  
Barrier Properties ◽  
Nanocomposite Membranes ◽  
Gas Barrier ◽  
Exfoliated Graphene ◽  
Graphene Platelets ◽  
Gas Barrier Properties

In situ synthesis of the reduced graphene oxide–polyethyleneimine composite and its gas barrier properties

2013 ◽  
Vol 1 (11) ◽  
pp. 3739 ◽  
Author(s):  
Hongyu Liu ◽  
Tapas Kuila ◽  
Nam Hoon Kim ◽  
Bon-Cheol Ku ◽  
Joong Hee Lee
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Barrier Properties ◽  
In Situ Synthesis ◽  
Gas Barrier ◽  
Reduced Graphene ◽  
Gas Barrier Properties

scholarly journals Correction: In situ solution polymerization for preparation of MDI-modified graphene/hyperbranched poly(ether imide) nanocomposites and their properties

RSC Advances ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 3624-3624 ◽  
Author(s):  
Quantao Li ◽  
Wenqiu Chen ◽  
Wei Yan ◽  
Quanyuan Zhang ◽  
Changfeng Yi ◽  
...  
Keyword(s):  
Solution Polymerization ◽  
Hyperbranched Poly ◽  
Modified Graphene

Correction for ‘In situ solution polymerization for preparation of MDI-modified graphene/hyperbranched poly(ether imide) nanocomposites and their properties’ by Quantao Li et al., RSC Adv., 2016, 6, 716–729.

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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