Why is vulcanised rubber stronger

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In fibres, this alignment allows forces such as those of hydrogen bonding between chains to have an increased effect, and they will be strong enough to hold the fibres in their stretched, aligned position. In rubbery polymers elastomers , we find there are large and bulky groups along the chains, and these prevent the chains from packing together so closely.

As the chains are further apart, there are not the same forces between them to keep them in the uncoiled arrangement. This weak interaction between polymer molecules is not enough to keep the rubber in its stretched position so it reverts to the original coiled state.

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All rights reserved. During a vulcanization process, rubber and sulfur, along with other chemicals, is heated to about degrees to degrees Fahrenheit in a pressurized mold. The combination of heat and chemicals forces the rubber to retract, and harden. While sulfur is the most common curing medium used in vulcanization, other chemicals used in the process include:. Countless rubber products and objects are vulcanized, some of which include O-rings, gaskets, seals and even tires.

ScienceDirect explains that vulcanization changes the physical properties of rubber by forcing it to retract. Of course, there are mechanical methods that can force rubber to retract as well. The difference with vulcanization, however, is that it retains the original shape of the rubber. When vulcanization is performed on rubber, the rubber shrinks while retaining its original shape. Vulcanization essentially scales down rubber to a smaller size, all without deforming or altering its shape.

Hi, We are looking into making a specialty rubber gasket. Do you know where one can purchase non vulcanized rubber? Define your site main menu. Vulcanized Rubber. Follow Us!

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