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nature : within plasticizer is actually part of the polymer molecules. General within polymer plasticizers in the polymerization process of the introduction of the second monomer, the second monomer copolymer molecules in the polymer structure, damaging the polymer chain Tacticity, reducing the degree of crystallinity, thus increasing the plastic. Other plasticizers in the polymer chain introduced branched-chain (which may be substitutes, could be grafted branch), the branched-chain polymer macromolecules can increase the distance between the lower molecular chain of force, thus increasing the plastic. The use of plasticizers within the relatively narrow temperature, and must join the polymerization process, it has been largely restricted, usually less used.
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