By Michael Tolinski
Additives for Polyolefins is a special quick-reference source in case you create or use polyethylene and polypropylene compounds―the so much commercially vital relations of plastic fabrics, making up on the subject of half the amount all plastics produced and used. those polymers will be dead with out numerous additives.
The booklet makes a speciality of polyolefin ingredients which are at the moment vital within the plastics undefined, along new ingredients of accelerating curiosity, akin to nanofillers and environmentally sustainable fabrics. up to attainable, every one bankruptcy emphasises the functionality of the ingredients within the polymer, and the worth each one proper additive brings to polypropylene or polyethylene. the place attainable, comparable ingredients are in comparison via power and relative cost.
In this new version, product tables were up-to-date with the most up-tp-date product and corporate names, new case reviews were additional, the function of nanofillers is mentioned in higher element, and the e-book concludes with a dialogue on mixing and dealing with ingredients, besides a wholly new bankruptcy on how engineers can method the difficulty of sustainability whilst making a choice on an additive.
- Assesses features and prices of a number ingredients to permit engineers and scientists to make the right kind choice for his or her estate requirements
- Provides concise, sensible information regarding the aim and use of particular ingredients, fillers, and reinforcements – demystifying the area of additions via delivering transparent, engineering motives, and together with real-world software case stories
- Updated to incorporate extra fabric on nanofillers, mixing and dealing with, and sustainability
Read or Download Additives for Polyolefins, Second Edition: Getting the Most out of Polypropylene, Polyethylene and TPO PDF
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Extra info for Additives for Polyolefins, Second Edition: Getting the Most out of Polypropylene, Polyethylene and TPO
2 Common Commercial UVAs and HALS-Based Light Stabilizers a Generic Designation CAS Number Commercial Grade Examplesa Polyolefin Application Notes UVA-1 1843-05-6 Chimassorb 81, Cyasorb UV-531 Food use compliant UVA-2 25973-55-1 Cyasorb UV-2337 Molded PP/TPO; low metal interaction UVA-3 3896-11-5 Tinuvin 326 Food use compliant UVA-4 2725-22-6 Cyasorb UV-1164 Low volatility, high solubility in polyolefins UVA-5 5232-99-5 UVA-6 178671-58-4 Uvinul 3030 Food use compliant HALS-1 52829-07-9 Tinuvin 770 Molded PP HALS-2 167078-06-0 Cyasorb UV-3853 Low molecular weight; color and gloss protection; synergies with high weight HALS and UVAs HALS-3 124172-53-8 Uvinul 4050 Low molecular weight, monomeric; FDA food contact approved HALS-4 64022-61-3 Lower basicity HALS-5 91788-83-9 For thin PP HALS-6 129757-67-1 Tinuvin 123 Liquid product HALS-7 71878-19-8, 70624-18-9 Chimassorb 944 High molecular weight, less migratory HALS-8 65447-77-0 Tinuvin 622 High molecular weight and oligomeric; low volatility/migration HALS-9 82451-48-7 Cyasorb UV-3346 High molecular weight, oligomeric; long term, low color; 1À2 year greenhouse films HALS-10 193098-40-7 Cyasorb UV-3529 Low acid reactivity, low volatility, compatible with other UVAs/HALS; artificial turf and greenhouse films HALS-11 152261-33-1 Uvinul 5050H Low basicity and interactivity with processing aids and paint systems HALS-12 106990-43-6 HALS-1 1 HALS-7 See above Tinuvin 791 High plus low molecular weight HALS HALS-7 1 HALS-8 See above Tinuvin 783 For tapes and thin products HALS-9 1 UVA-4 See above Cyasorb THT 4611 Long-term protection, efficient, low color, extraction resistant Nonfood use compliant High molecular weight, monomeric; low volatility/migration; color retention in pigmented polyolefins Trademarked product names from BASF (Chimassorb, Tinuvin, Uvinul) and Cytec Industries (Cyasorb).
Aided by the photo-oxidation from UV light energy, the degradation process results in chain scission, predominant in polypropylene, or crosslinking reactions, predominant in polyethylene. Photo-oxidation mainly takes place at the surface Additives for Polyolefins. 00004-1 © 2015 Michael Tolinski, Published by Elsevier Inc. 4: ULTRAVIOLET LIGHT PROTECTION STABILIZATION 33 of an unprotected resin, but it can occur deep within the solid material if the UV energy is not blocked by elements within the resin.
Photo reproduced by permission of former Ciba Corp. 2 Surface degradation from UV exposure. Micrographs show how 6000 h of UV weathering degrades a sample’s surface (at right), causing pores and loss of gloss, compared with the unexposed sample on the left. Photos reproduced by permission of former Ciba Corp. 4 Source: Derived from Ref. [4-28]. polymer. UV stabilizers can interrupt the degradation cycle itself by scavenging free-radical species or the peroxides they create. 2 summarizes various kinds of UV absorber (UVA) additives and hindered amine light stabilizers (HALS) discussed later in this chapter.