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The natures of the polymer and the additives used to increase tackiness (called tackifiers) influence the nature of mutual molecular interaction and interaction with the substrate. In one common system, EVA is used as the main polymer, with terpene-phenol resin (TPR) as the tackifier. The two components display acid-base interactions between the carbonyl groups of vinyl acetate and hydroxyl groups of TPR, complexes are formed between phenolic rings of TPR and hydroxyl groups on the surface of aluminium substrates, and interactions between carbonyl groups and silanol groups on surfaces of glass substrates are formed. Polar groups, hydroxyls and amine groups can form acid-base and hydrogen bonds with polar groups on substrates like paper or wood or natural fibers. Nonpolar polyolefin chains interact well with nonpolar substrates. Good wetting of the substrate is essential for forming a satisfying bond between the adhesive and the substrate. More polar compositions tend to have better adhesion due to their higher surface energy. Amorphous adhesives deform easily, tending to dissipate most of mechanical strain within their structure, passing only small loads on the adhesive-substrate interface; even a relatively weak nonpolar-nonpolar surface interaction can form a fairly strong bond prone primarily to a cohesive failure. The distribution of molecular weights and degree of crystallinity influences the width of melting temperature range. Polymers with crystalline nature tend to be more rigid and have higher cohesive strength than the corresponding amorphous ones, but also transfer more strain to the adhesive-substrate interface. Higher molecular weight of the polymer chains provides higher tensile strength and heat resistance. Presence of unsaturated bonds makes the adhesive more susceptible to autoxidation and UV degradation and necessitates use of antioxidants and stabilizers.
Tips No. 20. The wire baskets for simple organization.If your entryway space isn’t big enough for a furniture, use wire baskets to keep clutter out of sight. They will make it easy for you to store your sports equipment like balls, bike helmets, mittens, and other everyday items. It would be great if you are able to invest in baskets with lids.
Tips No. 142. Your cocktail cabinet.Do you like cocktails and romantic dinners? Are your spirits and liquors scattered all over kitchen and dining room? If your answer is yes – consider organizing a cocktail cabinet.a. Sort items into categories.b. Assign a space for your mixers, ice buckets shakers, trays, and other cocktail party equipment.c. Assign a space for the bottles and group them into categories.d. Line the shelves with paper or cork linings and place your glasses on it. Keep glasses upright and in widely spaced rows.
Tips No. 279. Organize kids’ study area– cube shelves.Conquer wasted space with amazing cube shelves for the wall that your little ones will love. Choose from a variety of colors and sizes, adorn your walls, and help your kids get organized.In terms of materials, opt for see-through acrylic to make things more manageable. Clear the desk of clutter and delight your little ones!