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Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while investigating diazomethane. [12] [a] [13] [b] When his colleagues Eugen Bamberger and Friedrich Tschirner characterized the white, waxy substance that he had created, they recognized that it contained long −CH 2 − chains and termed it polymethylene.
HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]
A 50 cent plastic bag levy was implemented on 1 April 2015 across Hong Kong. The use of plastic bags dropped 90% after the introduction of the levy. [79] Signs show that Hong Kong is phasing out the use of plastic bags at a dramatic rate. A sign proclaiming that polythene bags thinner than 30 μm are prohibited in Kasaragod, Kerala, India.
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The Sonali Bag is a cellulose-based biodegradable bioplastic alternative to plastic bags, particularly polythene bags. The cellulose used in Sonali Bags is extracted from jute, a major vegetable fiber crop grown across the globe. "Sonali Bag" was named by Bangladesh Prime Minister Sheikh Hasina in 2017. The Sonali Bag (biopolymer) is made of ...
On the review aggregator Rotten Tomatoes website, the film has an approval rating of 100% based on 7 reviews, with an average rating of 7.6/10. [ 7 ] Lee Marshall reviewing for ScreenDaily at Busan wrote, "Moving through the narrative with admirable dexterity, despite some contrived passages, it’s a well-made drama buoyed up by a raft of fine ...
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