Solvent-Resistant Properties

By virtue of their solvent-resistant property, polysulphide polymers are used extensively as integral fuel tank sealants. The construction industry utilises this property mostly in sealants in jet fuel aprons, laboratory floors, airport pavements and for use in petrol stations. Specific applications will be discussed separately in section 7.4. 

Huang, J.-C. Zhu, Z.-k Yin, J. Qian, X.-F. Sun, Y.-Y., Poly(etherimide)/montmori]lonite nanocomposites prepared by melt intercalation Morphology, solvent resistance properties and thermal properties, Polymer 2001, 42, 873-877. 

It was found that the maleic anhydride moeity appears to Increase the reactivity of SMA copolymers toward oxidizing acids while glacial acetic and hydrochloric acids hydrolyze esters of SMA copolymers. The solvent resistant properties of SMA copolymers compare favorably to those of polystyrene. 

The behavior and durability of synthetic resins in hostile enviroments has become an important consideration. Therefore, this investigation will focus on the chemical and solvent resistant properties of selected styrene-maleic anhydride copolymers. 

Table 3.2 Solvent-resistant Property of Polymer Hybrids from CubePOZO ...

The solvent resistance properties of the montmorillonite-filled conjugated linseed oil-based nanocomposites have been studied in THE by the equilibrium swelling method at different temperatures. The diffusion coefficient of the nanocomposite systems depends on the composition, percentage of clay and temperature. The diffusion coefficient increases with an increase in the clay content and temperature. The cross-link density of the nanocomposites ranges from -101-237 x 10 mol/cm. ... 

The primary rationale for developing the ASA/polyamide blends is to combine the high UV resistance of ASA resins with high heat and solvent resistance properties of the common semicrystalline polyamides such as PA6. The compatibUization of the ASA/PA6 blends uses the same technical approach as for the ABS/PA6 blends, viz., the use of a maleic anhydride-modified (copol5mierized) SAN copolymer as a polyamide-reactive compatibilizer as discussed before under the ABS/PA blends... 

Polyamides such as PA6 are engineering thermoplastics with high heat and solvent resistance properties and hence make ideal thermoplastic matrix candidates of choice to make high-performance TPVs with dynamically vulcanized mbber blends. Although nylon blends with low rubber content have been known for a long time as impact-modified nylons, as discussed under Sect. 19.7.1, elastomeric TPV blends of polyamide with high rubber content (>60 %) have not been commercially available until recently. Because of their higher thermal and chemical resistance performance, the polyamide-based TPVs have often been called super-TPVs (Leaversuch 2004). 

Hence, the development of polycarbonate blends was primarily market driven, with a motivation to extend the applications of polycarbonate into areas where improved chemical resistance and processability are required while still retaining high impact strength. The rationale for the development of commercial PC blends is summarized in Table 19.27. Comparison of the properties of various polycarbonate blends is shown in more detail in Table 19.28. In the development of all these commercial polycarbonate blends, one common goal was to maintain a very high level of impact strength while improving the notch sensitivity of impact, chemical, or solvent resistance properties and the cost balance. 

In 1908, aromatic polyimides were first reported by Bogert and Renstiaw [1]. Aromatic polyimides became well-known in 1950, after successful development of two-step polyimide synthesis by DuPont [2]. This class of polymers possesses a number of outstanding properties such as excellent thermal stability, mechanical strength, and electrical properties that have led to application in several fields from engineering thermoplastics to the aerospace and electronics industries, as well as for fibers and adhesives and in matrices for composite materials [3-5]. In addition, polyimides have high thermo-oxidative stability and chemical- and solvent-resistive properties, leading to many membrane-based applications... 

Table 4. General Solvent Resistance Properties for sPS Formulations ...

The carboxyl-terminated liquid polymers (CTBN) are telechelic polymers ranging in comonomer acrylonitrile content from 0 to 27 percent. Table 2 gives the characterization of these polymers. They are solvent-free and range in M from 3400 to 4000. The higher acrylonitrile-containing CTBN type possesses the best balance of oil- and solvent-resistant properties. 

The possibility of preparing thermoplastic rubbers by blending PP with dynamically vulcanised waste butyl rubber has been reported by a group of Chinese workers [7]. They carried out a series of tests on the blends using a range of techniques to characterise their mechanical, processing and solvent resistance properties. 

As discussed in Section 9.6 of Chapter 9, polymers are blended together with the expectation of obtaining a material having enhanced thermal, mechanical, or solvent-resistance properties relative to the blend constituents. If one of the components is crystalUzable, the presence of the other component can influence the nature, rate, extent, and temperature range of crystaUization. If the two polymers are immiscible, crystallization may occur in the domain of one polymer unaffected by the presence of the other polymer, or the other polymer may act as a... 

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