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Autoacceleration of the overall rate of a free-radical polymerization system has been noted in many bulk polymerization systems. The polymerization of methyl methacrylate, for example, deviates strongly from classical mechanism behavior around 20% conversion; in this region the conversion and molecular mass of the polymer produced increases rapidly.
Foam peanuts (made of expanded polystyrene) The inner structure of a foam peanut, magnified 390× on an SEM. Foam peanuts, also known as foam popcorn, packing peanuts, or packing noodles, are a common loose-fill packaging and cushioning material used to prevent damage to fragile objects during shipping.
Polymer morphology is a microscale property that is largely dictated by the amorphous or crystalline portions of the polymer chains and their influence on each other. Microscopy techniques are especially useful in determining these microscale properties, as the domains created by the polymer morphology are large enough to be viewed using modern ...
The bisphenols (/ ˈ b ɪ s f ɪ n ɒ l /) are a group of industrial chemical compounds related to diphenylmethane; commonly used in the creation of plastics and epoxy resins. [1] [2] [3] Most are based on two hydroxyphenyl functional groups linked by a methylene bridge.
In polymer chemistry, polymerisation inhibitors (US: polymerization inhibitors) are chemical compounds added to monomers to prevent their self-polymerisation. Unsaturated monomers such as acrylates , vinyl chloride , butadiene and styrene require inhibitors for both processing and safe transport and storage.
Popcorn Lung is a debilitating and irreversible respiratory disease which causes "scarring in tiny air sacs in the lungs that lead to excessive coughing and shortness of breath" similar to that ...
Polymer networks are susceptible to damage during their use. Self-healing is a promising tool to increase the lifetime and performance of the polymer, while simultaneously reducing plastic waste . Self-healing can operate via extrinsic or intrinsic mechanisms.
The next time you pop in a movie, rethink your snack habit: Even if you split the bag of microwave popcorn, you'll down 20 percent of your daily allotment of sodium—plus oftentimes trans fat and ...
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