Resins, Group

Ion-exchange is the process by which positive or negative ions fixed to the resin groups (radicals) can exchange, under certain conditions, with other ions of the same sign, in (aqueous) solution that are in contact with them, without any apparent change, deterioration, or solubilization of the resin. 

Wide chemical variation is possible within the intermediate types as well. The ethoxylated resin group demonstrates variable molecular weight on its resin base with different amounts and placement of ethoxylated groups. These structural variations provide a complete range of solubilities, charge neutralization tendencies, solids-wetting characteristics, and costs. 

As the exchange capacity of the resin increases, the proportion of the salt the diffuses into the resin decreases, with the result that the ionic component is excluded from the resin to a large extent. D is usually less than 1 for ionic components and from 1-2 for nonionics, with values over 50 in some special cases. Generally, it is close to 1, unless some additional interaction between the resin groups and the sample compound is taking place. D for the nonionic components depends upon the size of the molecule and increases with chain length and solution concentration. D for the ionic components varies with the type of resin, the amount of cross-linking, and the inherent capacity of the resin. 

The high volume - low price resin group that are used commonly (i.e., PE, PP, PS, PVC). 

Allyl diglycol carbonate resin n. A thermosetting-resin group with outstanding optical clarity, good mechanical properties, and the highest scratch resistance of all transparent plastics. The resins are made by polymerizing the monomer of the same name with catalysts such as benzoyl peroxide or, preferable, diisopropyl peroxy dicarbonate. 

Norpex, PPO-based engineering thermoplastics. Custom Resins Group Norsfl, Two-component siUcones, Insulcast Noryl, Polyphenylene oxide-based resin, GE Plastics... 

Nylamid, Nylon-based engineering thermoplastics, Custom Resins Group... 

Resin Group I (mid-block compatible resins). These resins increase the mid-block of Kraton samples without changing the of the styrene domains, as they are compatible only with the mid-block. These resins also decrease simultaneously the plateau modulus values. These are so-called tackifying resins or mid-block compatible resins because they reduce the... 

Resin Group II (end-block compatible resins). These resins increase or decrease the end-block Tg value of Kraton samples without changing the value of the mid-block domain. These resins also increase simultaneously the modulus values of the Kraton rubber. Aromatic resins, A-F in Table 6, belong to this group. The changes of end-block depend on the of... 

Resin Group III. These resins are compatible with both blocks of Kraton. Therefore, they increase the value of the mid-block and decrease the value of the end-block. Resins such as G and H in Table 6 belong to this group. Examples are shown in Figure 27. Resin I is compatible with both domains of Kraton G 1650 and changes their glass transition temperatures as shown in Figure 27. 

Actinide Resin Group actinide separation, gross alpha-measurements... 

Resin group Resin type Types of glycols Types of acids styrene content [ivt.%] max. rq min. HDT rq min. Tensile strength [MPa] min. Elongation at break (tension) [%] min. Flexural strength [MPa] min. 

A resinic group of average molecular weight, responsible for the properties of adhesiveness and consistency. 

Assuming specific medium influence, its concentration, and operating temperature, media class I to X and the applicable resin groups are determined (example DIBt media lists [7]). This will result in the suggestion of several resin groups with key numbers, see also Appendix A. 17. 

The key numbers 1-8, i.e., the selection of the resin groups to be used, are provided by DIN 18820-1 [8] at the maximum stated content of crosslinking agent, Table 5.1 [8]. The resins are classified according to their chemical structure in DIN 18820-1 into resin groups and by molded material properties into resin types according to DIN 16946. 

Tables A.48, A.50 and A.53 also provide the resins to be used for load bearing laminates and their non-woven or chemical protective layers depending on the operating temperature of fluids and the duration of exposure. Unless otherwise stated, the use of different resins for the protective layer and the load bearing laminate is permitted. The resin groups are defined in DIN 18820-1, taking into consideration all influences by molecular structure elements of the matrix materials.

The resins suitable for the manufacturing of the load bearing laminates, the non-woven layers, and the chemical barrier layers can also be obtained from Table A.49 (depending on service temperature and exposure time of the respective medium). Unless specified differently, the use of different resins for barrier layers and supporting laminates is permissible. The resin groups are defined in EN 13121-1 (7). 

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