“…Control experiments with commercial i PP, HDPE, and nylon-6,6 resins confirmed this effect was a consequence of the intensive properties of i PPO and not the experimental setup (Figure S52). Although this behavior is more commonly observed in metals, , stress oscillations (SOs) have been reported in a variety of common polymers such as HDPE, , i PP, syndiotactic PP, − polyethylene terephthalate, ,,− PAs, ,, polyvinyl chloride, and bisphenol A polycarbonate . While much debate has taken place on the mechanism for why SOs occur, a recent report by Hughes claims that the response is the result of crazing and formation of microcavities within their poly(butylene succinate) specimens.…”