The influence of EB-crosslinking on barrier properties of HDPE-mica composites

Abstract

SYNOPSISHigh-density polyethylene (HDPE) was compounded with untreated and surface-treated mica (10,20,40 wt %) and composites were injection-molded. The composites were radiation crosslinked (100, 300, 700 kGy) and hydrocarbon permeability, tensile impact strength, and tensile strength at 25 and 80°C of the composites were examined. The permeability of HDPE decreased from 7 to 3.6 g/(d X m2) by compounding the polymer with 20 wt % mica, and the permeability was additionally reduced to 1.3 g/(d X m2) by irradiation of the compounds (700 kGy). When surface-treated mica was used, the permeability of the composite furthermore decreased to about 1.0 g/(d X m'). Upon irradiation, the E modulus measured at 25°C increased 5% when the dose was 300 kGy. At 8OoC, the corresponding increase was 40%. The tensile impact strength of an unfilled polymer increased more than three times by an irradiation dose of 700 kGy, and for a polymer with 10 wt % mica, the tensile impact strength was twice the level of an unirradiated composite. 0 1996 John Wiley & Sons, Inc.

Influence of the silane grafting of polyethylene on the morphology, barrier, thermal, and rheological properties of high‐density polyethylene/organoclay nanocomposites

“…Similarly, the nanocomposites with a grafted matrix yielded better barrierity after crosslinking. This effect was explained by a reduction in the chain mobility of the polymer as a result of crosslinking in the amorphous regions and was reported by Sodergard et al55…”

“…Then, effects of clay intercalation and silane grafting on the thermal and rheological properties and oxygen permeability of the nanocomposites was elucidated. We also explain the results about effects of post crosslinking of the prepared nanocomposites (due to the moisture curing of grafted PE) for further enhancement of the barrierity54, 55 and other properties as well as stabilization of the microstructure.…”

Electron Beam Initiated Cross–linking in Hybrid Nylon 66 Membranes

“…The gel corresponds with the network structure in an amorphous region of nylon 66 due to the insolubility of the material. A previous study reported that Efs-crosslinking increased gel content [10,13,14]. Sengupta et al [10] also reported that, below 200 kGy, there is an absence of any gel content.…”

Effect of Interfacial Interaction on Properties of Gamma Ray-Irradiated High Density Polyethylene Reinforced by Sericite-Tridymite-Cristobalite

“…[1][2][3][4] . The common problems in filler-reinforced polymer composites is the poor interfacial interaction between polymer and fillers.…”