Answer:
B) Thin platelets with chain folds at the faces
Explanation:
Crystalline polymer is folding together of molecular chain in an ordered way to form lamella. Polymer crystallize after cooling from evaporation of solvent. It affects the properties of the polymer such as thermal property.
Polymer on freezing becomes disorder forming an amorphous solid.
Answer:
Convent bonding of cross linking constrain polymer chains from relative movements. the degree of cross linking will correlate with the stiffness of the polymer. highly cross-linked polymers will also have a high resistance to creep as the chains cannot move into new positions.
Explanation:
Answer: Partly it's because teenagers are quite different from their childhood selves. This is because the brain is continuing to mature and also because sex hormones such as testosterone, estradiol and progesterone influence brain function and these are the hormones that rise to adult concentrations at puberty.
Explanation:
The answer is D. A need to reduce air pollution