Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 255
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Fill in the blank: Polyvinyl chloride is a polymer that contains microcrystals (5% by weight of crystalline material); the melting point of these microcrystals is as high as 200°C. This poses a significant challenge for the processing of polyvinyl chloride. Since these microcrystals cannot be removed, it is necessary to add ( ) or other modifiers in order to lower their melting point and facilitate processing. Plasticizer
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Plasticizer~~~~~~~~~~~~~~~~~~~~
Polyvinyl chloride is a polymer that contains microcrystals (5% crystalline content), and these microcrystals have a melting point as high as 200°C. This is particularly problematic for the processing of polyvinyl chloride; however, it is not possible to remove these microcrystals. Therefore, plasticizers or other modifiers must be added to lower their melting point, thereby facilitating processing.
Polyvinyl chloride is a polymer that contains microcrystals (5% crystalline content), and these microcrystals have a melting point as high as 200°C. This is particularly problematic for the processing of polyvinyl chloride; however, it is not possible to remove these microcrystals. Therefore, plasticizers or other modifiers must be added to lower their melting point, thereby facilitating processing.
Polyvinyl chloride is a polymer that contains microcrystals (5% crystalline content), and these microcrystals have a melting point as high as 200°C. This is particularly problematic for the processing of polyvinyl chloride; however, it is not possible to remove these microcrystals. Therefore, plasticizers or other modifiers must be added to lower their melting point, thereby facilitating processing.