1+ day, 16+ hour ago   (592+ words) Para-aramid polymers such as poly(p-phenylene terephthalamide), better known by trade names like Kevlar, have long been celebrated for their extraordinary combination of strength, thermal stability and chemical resistance. A fully aromatic backbone locked together by dense intermolecular hydrogen bonding…...

2+ day, 4+ hour ago   (731+ words) Every year, millions of tonnes of polypropylene enter the environment as packaging, agricultural films, automotive components and everyday consumer goods. Once outdoors, these plastics are bombarded by ultraviolet radiation, attacked by humidity and stressed by wind, waves and abrasion. A…...

3+ day, 3+ hour ago   (92+ words) Riveted joints remain the backbone of aircraft fuselage construction, and a new experimental study has now mapped, in unusual detail, how cracks behave when two different aluminum alloys are riveted together and pulled apart under opening-mode loading. Researchers at the…...

4+ day, 17+ hour ago   (73+ words) Polymeric heart valves have long promised the best of both worlds in prosthetic cardiology: the durability of mechanical valves and the gentle blood-flow characteristics of tissue valves. Yet the field has struggled to link polymer chemistry at the molecular scale…...

4+ day, 22+ hour ago   (83+ words) Every year, billions of tires reach the end of their service life, and while a portion of that rubber is recycled into playground surfaces, athletic tracks, and crumb rubber–modified asphalt, the civil engineering community has long struggled to unlock…...

5+ day, 15+ hour ago   (454+ words) Researchers at the Cape Peninsula University of Technology in Cape Town have reported a systematic development process aimed at building a single-photon detector that costs a small fraction of the commercial instruments that currently dominate quantum optics laboratories....