What is the difference between cross linked and uncross linked polyethylene?
Cross-linked polyethylene is a better barrier than uncross-linked polyethylene of similar crystallinity. Cross-linked polyethylene (XLPE) is a thermosetting resin with three types of cross-linking: peroxide cross-linking, radiation cross-linking, and silane cross-linking.
What are the methods of chemically crosslinking proteins?
A number of techniques for studying the structure and interaction of proteins, as well as for manipulating proteins for use in affinity purification or detection procedures, depend on methods for chemically crosslinking, modifying or labeling proteins. Crosslinking is the process of chemically joining two or more molecules by a covalent bond.
How can we crosslink poly(vinyl alcohol) by glutaraldehyde by application of heat treatment?
How can we cross-link Poly (vinyl alcohol) by glutaraldehyde by application of heat treatment? there are some reports which used Glutar Aldehyde as a crosslinking agent for PVA while they did not use any catalysts such as HCl. So they crosslinked PVA by heat treatments such as @ 150 C for 1 hour.
How to obtain cross-linked PE?
Besides cross-linking with water, several techniques have been developed to obtain cross-linked PE, such as peroxide cross-linking, irradiation, and silane-cross-linking. However, both peroxide and irradiation cross-linking techniques are costly and pose a risk of precuring.
What are the different types of plastics that are heat shrinkable?
Since the 1950s an increasing number of different polymeric materials have been developed and applied as heat shrinkable plastics, i.e., cross-linked polyvinylchloride (PVC), silicone rubber, cross-linked polyolefins, polyamide, and polytetrafluoroethylene (PTFE).
What is XLPE resin?
Cross-linked polyethylene (XLPE) is a thermosetting resin with three types of cross-linking: peroxide cross-linking, radiation cross-linking, and silane cross-linking. The polymer can be effectively recycled if only the cross-linking points are decomposed. From peroxide cross-linked polyethylene, the cross-links are selectively removed by using ...
What is PEX tubing?
A modification of HDPE is called cross-linked PE (PEX). It is a form of PE with cross-links and it is commonly abbreviated as PEX or XLPE. The HDPE has undergone a chemical or physical reaction that causes the molecular structure of the PE chains to link together as described in Section 3.3 and Figure 3.11Section 3.3Figure 3.11. This reaction creates a three-dimensional structure which has superior resistance to high temperature and pressure. PEX is primarily used in tubing. There are three primary commercial methods for producing PEX tubing:
Can silane be crosslinked?
In contrast, the silane cross-linking technique does not suffer from high investment cost, and the ethylene–vinyl silane copolymer can be processed and shaped using conventional thermoplastic processing equipment and subsequently cross-linked after the processing steps.
Is polyethylene a good material for femoral wear?
Highly cross-linked polyethylene will be a key material in solving the wear problem, if clinical results with it are good and it exhibits no problems. A new femoral component made of zirconium alloy with a surface hardened by zirconium oxide is already on the market in Europe and the United States.
All Answers (3)
PVA crosslinking by glutaraldehyde vapor is feasible. If you can explain your question, someone may help you.
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Why do PVA nanofibers still quickly dissolve in aqueous media after cross linking with 25% glutaraldehyde?