Polypropylene (PP) can be obtained in several forms. Two of these are an atactic

Question

Polypropylene (PP) can be obtained in several forms. Two of these are an atactic and an isotactic Atactic polypropylene can crystallize whereas isotactic polypropylene cannot Atactic polypropylene and isotactic polypropylene are both fully glassy at room temperature At room temperature atactic polypropylene is solid because of cross-links whereas isotactic polypropylene is solid because it is semicrystalline Atactic polypropylene and isotactic polypropylene both have glass transition temperatures, Ta, slightly below 0°C

Explanation / Answer

It is because the isotactic has a glass temperature in the range of 272K and atactic has the glass transition temperature in the range of 266K. Rest of other options are not as close to correct as this option.

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