Resins Containing POSS

32 was incorporated into a series of resins with from 1 wt % to 5 wt % (0.1 mol % to 0.5 mol %) of 32 present. When co-cured in four stages (final stage 260°C, 1 h), DCPD/POSS-32 gave a series of resins wifli from 1 wt % to 5 wt % (0.1 mol % to 0.5 mol %) of 32 present. The presence of 1-5 wt % of the POSS-32 macromer increased Tg in these DCPD resins (note it did not change the Tg in the aliphatic epoxy resins). However, the dependence of the resin s Tg on the weight percent of POSS-32 present was complex. 

The bending modulus increased as the loading of 32 was raised in these DCPD/32 resins (at temperatures both below and above the T. The tan8 peak intensity was reduced while the peak width was substantially broadened. The Tg value of the DCPD resin (182.5°C) increased by 5.8°C to 188.3°C when only 1 wt % of 32 was added. The DCPD/5 wt % 32 resin exhibited a bending storage modulus at 10 Hz of 1.54GPa at 40°C and 0.032 GPa at 240°C, which may be compared to those of the pure DCPD resin, which were 1.45 GPa and 0.027 GPa, respectively. Thus, despite die fact that the volume occupied by POSS would lower the DCPD resin s 

The norbornenyl-functionalized partially opened, cage macromer 38 (Fig. 15, R = cyclopentyl) also was incorporated by ROMP into DCPD resins using the same 

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IV CROSSLINKED POSS-CONTAINING RESINS AND MATERIALS 106 A. Vinyl Ester, Epoxy, and Phenolic Resins Containing POSS 108... 

C. Styrene and Methyl Methacrylates Resins Containing POSS 117... 

The dehydration of t-butyl alcohol over styrene-divinyl benzene resins containing different combinations of the acid groups -PO(OH)2, -P(OH)2, and -SO3H gave rate data which were best described by a Langmuir-Hinshelwood expression (equation 4), and involved summation of contributions for each site, ie. 

Essential for solderability is the absence of THEIC from the molecule of po-ly(ester-imide). To get acceptable thermal properties, branching of the polymer is necessary. There are known solderable poly(ester-imide)s containing glycerine, ethylene glycol, terephthalate and DID acid [185-187]. Another resin contains only glycerine, ethylene glycol and DID acid [188]. Glycerine can be re-... 

Sodium Polystyrene Sulfonate (Kayexalate) [Potassium Removing Resin] Uses Rx of T K Action NaVK" ion-exchange resin Dose Adults. 15-60 g PO or 30-60 g PR q6h based on serum Peds. 1 g/kg/dose PO or PR q6h based on serum (given w/ agent, eg, sorbitol, to promote movement through the bowel) Caution [C, M] Contra T Na" Disp Powder, susp SE T Na", -i Na retention, GI upset, fecal impaction Interactions T Risk of systemic alkalosis W/ Ca- or Mg-containing antacids EMS Monitor ECG for h5 pokalemia (flattened T waves) OD Not systemically absorbed but may cause h5 pokalemia and the associated effects (muscle weakness, confusion) and bowel obstruction s5rmpto-matic and supportive... 

Cleavage of the phosphonate allyl esters from Abu[PO(OAl)2]-peptide-resins is accomplished by treatment with Pd(PPh3)4 (50 °C, 5 h)[103l followed by acidolytic deprotection of the Abu[PO(OH)2]-peptide from the resin support. The viability of employing allyl phosphonate protection for phosphopeptide synthesis has been demonstrated by the Fmoc solid-phase synthesis (DIC/HOBt couplings) of several 6-9-mer Abu[PO(OH)2]-containing peptides and has been extended to the synthesis of a 19-mer caldneurin-related Abu[PO(OH)2]-peptide.[104 ... 

It should be remembered that additives used for one type of resin may have detrimental effects on another resin and/or on its additives. It was reported that the interfacial properties in PA/PO blends can be seriously affected by incorporation of unsuitable additive into a blend. When PA scrap was mixed with PO containing phosphite stabilizers, a rigid membrane was formed at the interface by a chemical reaction between -NH groups of PA and phosphite acidic functionality [Luciani et al., 1997]. The membrane has two serious effects it increases the melt viscosity (thus, it reduces the throughput), and it makes dispersing the PO in PA much more difficult (what reduces the performance). The detrimental effects are most likely when heat and light stabilizers are present in the recyclates. 

Lamp-black is obtained by incomplete combustion of some resinous or tarry substance, or natural gas, the smoke or soot from which is directed into suitable condensing-chambei-s. It is a light, amorphous po-wder, and contains a notable quantity of oily and tarry material, from which it may be freed by heating in a covered vessel. It is used in the manufacture of printer s ink. 

Some people connected to the plastics industry (I hope I am not alone) may have developed a slighdy obsessive habit turning plastic containers or components upside down to check the resin s identity on the article s material identification mark. The results of this investigation are usually not surprising the feel and type of the article often by themselves immediately indicate that its material is some form of polypropylene (PP) or polyethylene (PE). What is often surprising is the diversity of form, texture, color, and stiffness various polyolefin (PO) articles have. 

Impact-modifying additives designed to inaease the drop impaa resistance of rigid PP containers, for example, may also be chosen for how they affea darity. PO bottles require low-temperature drop-impact properties in particular, which can be enhanced with additions of metallocene plastomer modifiers. However, these modifiers can create haze if they have shown large enough differences in refractive index with the base resin. Specifically, in tests of HDPE bottles, plastomers with lower densities ( 0.900) were found to affea darity very little (20%-24% haze), whereas a 0.910-density plastomer produced "noticeable" haze (37%) [10-22]. 

G. Lligadas, J. C. Ronda, M. GaUa and V. Cadiz, Development of novel phosphorus-containing epoxy resins from renewable resources , / Po/ym Sci Part A Polym Chem,2006,44,6111-21. 

SEBS was used to compatibilize PP with either PS or HIPS. The blends showed good impact and flexural strength [34]. Addition of SEBS was found to be expensive but useful in many recycling processes. Other compatibilizers for commingled polymeric scrap containing PS and PO and other resins, are CSR, SBR, (SB)n block copolymers, polybutylene-1, a copolymer of butylene-1 and ethylene, isotactic polybutene [3], etc. 

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