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Longitudinal shrinkage

Figure 5. Effect of heating rate on longitudinal shrinkage of redwood... Figure 5. Effect of heating rate on longitudinal shrinkage of redwood...
The structure has primary and secondary alcohol groups uniformly interspersed throughout the length of the polymer chain. These hydroxy units impart high water absorption characteristics to the fiber and can act as reactive sites. The cotton fibers are hydrophilic and swell in water. It is hydrolyzed by hot acid and swollen by concentrated alkali. The cotton is treated with caustic soda solution (12 to 25 percent) under tension to develop a silk-luster and stop longitudinal shrinkage. This process is called mercerization. Mercerized cotton exhibits increased moisture and dye absorption. [Pg.269]

Figure 22. Diagramatic representation of the longitudinal shrinkage behavior... Figure 22. Diagramatic representation of the longitudinal shrinkage behavior...
Figure 23. Thermally induced longitudinal shrinkage in dry newborn rat stratum corneum (He atm, 20° C/min heating rate) (10)... Figure 23. Thermally induced longitudinal shrinkage in dry newborn rat stratum corneum (He atm, 20° C/min heating rate) (10)...
Figure 27. Upper curve effect of chloroform-methanol and ether on 196°C longitudinal shrinkage in newborn rat stratum corneum. Lower curve, chloroform-methanol reduction of 50°C longitudinal shrinkage (He atm) (11). Figure 27. Upper curve effect of chloroform-methanol and ether on 196°C longitudinal shrinkage in newborn rat stratum corneum. Lower curve, chloroform-methanol reduction of 50°C longitudinal shrinkage (He atm) (11).
Although the longitudinal shrinkage of tension wood is not as large as that of eompression wood, it is still mueh higher than normal wood. Like eompression wood, tension wood is a serious defect in timber owing to its uneven shrinkage and is now known to be quite eommon in vertical stems, especially below the point of attaehment of lateral branehes. [Pg.19]

To a first approximation the longitudinal shrinkage can be ignored. The volumetric shrinkage then becomes ... [Pg.102]

Figure 6.9. Longitudinal shrinkage in loblolly pine, Firms taeda, as a function of MFA for rings 5, 15 and 25 in butt wood (Megraw et al., 1998). Figure 6.9. Longitudinal shrinkage in loblolly pine, Firms taeda, as a function of MFA for rings 5, 15 and 25 in butt wood (Megraw et al., 1998).
Figure 6.10. Longitudinal shrinkage shrinkage in specimens of loblolly pine, Pinus taeda, as a function of stiffness (International Patent, 2000 filed by Weyerhaeuser). Figure 6.10. Longitudinal shrinkage shrinkage in specimens of loblolly pine, Pinus taeda, as a function of stiffness (International Patent, 2000 filed by Weyerhaeuser).
Floyd S (2005) Effect of hemicellulose on longitudinal shrinkage in wood. In Entwistle K and Walker ICF (eds), The Hemicelluloses Workshop 2005. Wood Technology Research Centre, University of Canterbury, Christchurch, New Zealand, 115-20... [Pg.567]

Advances in Chemistry Series 207. American Chemical Society, Washington DC, 257-89 Meylan BA (1968) Cause of high longitudinal shrinkage in wood. Forest Products Journal, 18 A) 75-8... [Pg.577]

Blend composition Longitudinal shrinkage Elongation Radial expansion... [Pg.844]

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