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zysi [14]
3 years ago
14

What’s the difference of dawling paper and offset paper?

Chemistry
1 answer:
Karolina [17]3 years ago
6 0
Dowling paper also known as the “dao ling paper," was originally produced by the United States Dowling (Dowling), which is a kind of more advanced paper. The wood is the raw material of Dowling paper. According to the paper whether have luster or not, it is divided into rough dowling paper and smooth dowling paper. The formal name of Dowling paper is glazed paper or glazed printing paper, which is a special paper for glazed printing and also suitable for letterpress printing. Glazed printing paper is suitable for printing and making Monochrome or polychromatic book covers, more advanced text and the insert or pictures (such as various medical journals - China social medical journal), all kinds of colorful illustrated, map paper, Commercial paper or public welfare propaganda, color trademark and all kinds of packaging paper and so on. The glazed printing paper technology is complex, so the requirement of paper quality of printing paper is high. Glazed printing paper is made by  bleached chemical pulp, bamboo pulp, rag and straw pulp and it is also needed to add some padding (Talcum powder, clay,) and mucilage (chemical agent such as surface sizing agent ). It is made on   the long wire paper machine, and calender , finally form paper into storage.<span>
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Which functional group occurs in the monomers of addition polymers? How are these polymers different from one another?
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Addition Polymerization reaction also known as chain Polymerization reaction. Monomers must contain double bond as a functional group.

<h3>What is Polymerization Reaction? </h3>

The chemical reaction which involves the addition of monomers to form higher molecular mass molecules is known as polymerization. There are two basically two types of polymerization, one is chain-reaction (or addition) and the other is step-reaction (or condensation) polymerization.

<h3>Chain-reaction (addition) polymerization</h3>

One of the most common and important types of polymer reactions is chain-reaction (addition) polymerization. This type of polymerization involves three step process including two chemical entities. The first which is known simply as a monomer. It is initially exists as simple units. Normally in all cases, the monomers must have at least one carbon-carbon double bond. Ethylene is one of the best known example of a monomer which is used to make a common polymer.

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It is second type of polymerization reaction. This polymerization method is used to produce polymers having lower molecular weight as compared to chain reactions and requires higher temperatures to occur.

In this type of reaction, monomers must have two functional group.

Thus, we concluded that the Monomers must contain double bond as a functional group in addition Polymerization reaction.

learn more about Polymerization reaction:

brainly.com/question/7025919

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