Which one of the following statements is true? (a) The glass transition temperat

Question

Which one of the following statements is true? (a) The glass transition temperature of semi-crystalline PE lies below the melting temperature of semi-crystalline PH, if measurements are obtained from samples having the same molecular weight distribution. (b) The isotactic conformation of polypropylene is more regular than the syndiotactic conformation of polypropylene. (c) Vinyl polymers can exist as both cis and trans isomers. (d) Atactic PMMA is more crystalline than atactic PS. (c) The melting temperature of semi-crystalline PP is not sensitive to tacticity.

Explanation / Answer

True statements among the given are,

(b) isotactic conformation is more possible for polypropylene than syndiotactic

(c) Vinyl polymers can exist as both cis and trans forms

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