Analysis of Polymers during Mechanical Strain

As j t-polypropylene chains became oriented on stretching, Sozzani et al. 

CP MAS NMR Trans-gauche shifting to higher tram levels with increasing sf-polypropylene chain orientation (a) 

CP MAS C NMR Crystallization of poly(tetramethylene oxide) block on orientation of stretched poly(butylene terephthalate)- )/c ck-poly(tetramethylene oxide) elastomers (-700% strain) (b) 

FTIR Interchain hydrogen bonding in polyurethanes decreasing with increasing strain (c) 

FTIR Chain orientation in glassy epoxy resins increasing with plastic deformation (10% strain) absorbances measured parallel and perpendicular to the stretching direction (d) 

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