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how to make polyaniline thin film
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For a high mileage BMW 325, it's generally recommended to use a slightly thicker oil than what's suggested for newer engines to better protect older components. The original recommendation for a BMW 325 might be 5W-30, but for an engine with high mileage, a transition to 5W-40 or even 10W-40 can be beneficial. This adjustment compensates for the engine's increased wear and potential for larger clearances between parts. It's crucial, however, to use synthetic oil, as it provides superior protection and performance compared to conventional oils, especially in older engines. Always refer to the owner's manual and consider the advice of a professional mechanic or BMW specialist to ensure compatibility with your engine's specific needs and conditions.
Epoxy can bond to plastic, but its efficacy largely depends on the type of plastic involved. Plastics like polyethylene and polypropylene are known for their resistance to adhesion due to their non-porous and slippery surfaces, making it difficult for epoxy to grasp. However, certain surface preparations, such as sanding to create a rougher surface or using a plastic primer, can improve adhesion. For plastics that are more naturally receptive, like ABS or PVC, epoxy tends to bond well without extensive preparation. It's crucial to select an epoxy formulated specifically for use with plastics and to follow the manufacturer's instructions for the best results.
Thickener 466, also known as E466 or hydroxypropyl methylcellulose (HPMC), is a synthetic polymer derived from cellulose. It's produced by treating cellulose with alkali and then reacting it with methyl chloride and propylene oxide. This process creates a water-soluble ether that can thicken, bind, emulsify, and stabilize various formulations. Commonly used in pharmaceuticals as a tablet binder and in food products to improve texture and consistency, Thickener 466 is also utilized in personal care items, construction materials, and adhesives. Its versatility stems from its ability to form clear, colorless solutions and its stability over a wide range of pH levels.
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