Biaxial orientation of poly(vinyl chloride) compounds: Interaction between drawing, structure, and properties

Gilbert, Marianne; Liu, Z.; Hitt, David

doi:10.1002/pen.11836

Cited by 18 publications

(15 citation statements)

References 13 publications

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“…The increased orientation observed here correlates with improved mechanical properties. 10 The 3D facility has enabled the second distribution to be investigated in more detail in uniaxially drawn films than previously, 11 and lead to a reinterpretation of this crystallite orientation. Guerrero 12 had also found that the second distribution of crystallites was present at a higher concentration in films drawn to a higher draw ratio, as is observed here.…”

Section: Discussionmentioning

confidence: 96%

X‐ray pole figures to assess orientation in PVC sheets

Gilbert

Ross

Kim

2007

J of Applied Polymer Sci

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A series of X-ray pole figures were obtained from oriented and unoriented rigid polyvinyl chloride sheets. From these, information about crystallite orientation in uniaxially and biaxially drawn sheets stretched at 908C was obtained. Uniaxial orientation produced two crystallite orientations with the extent of orientation increasing with draw ratio; for biaxial samples the chain direction (c) was distributed uniformly in the plane of the sheet, with the planar orientation improving as draw ratio increased.

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Section: Discussionmentioning

confidence: 96%

X‐ray pole figures to assess orientation in PVC sheets

Gilbert

Ross

Kim

2007

J of Applied Polymer Sci

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“…From the studies at IPTME [5][6][7][8] on the effects of orientation on the properties of rigid PVC it has been found that both yield strength and tensile strength follow the same pattern when properties are plotted against planar strain. (This is essentially the product of the draw ratios applied to the material, for example, PVC sheets stretched uniaxially to draw ratios of 3.0 x 1.0 and equally biaxially to 1.73 x 1.73 have the same planar strain of 3.0.)…”

Section: The Dependence Of Mechanical Strength Of Oriented Rigid Pvc mentioning

confidence: 99%

“…in which p is a hydrostatic pressure, I is the identity tensor, and f σ is the filament stress given by (6).…”

Section: Application Of the Filament Theory To Predict Yield Stress Imentioning

confidence: 99%

“…Hence, these deviatoric stresses (8) can be calculated using (9) and the filament theory (1)- (6) and then used to produce values for 1 Y , 2 Y and 3 Y through (7). Furthermore, the principal yield stresses (7) can be combined to give the yield stress in a particular direction θ as θ θ …”

Section: Application Of the Filament Theory To Predict Yield Stress Imentioning

confidence: 99%

“…Removal of the restraint at the draw temperature will enable the stretched material to recover its original dimensions. Experimental data gathered from previous studies at IPTME [5][6][7][8] has shown the tensile strength properties of oriented PVC sheets are related to the strains imposed at 90°C in a very systematic way. This behaviour is clearly ideally suited to the application of mathematical modelling.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Model to predict the mechanical behaviour of oriented rigid PVC

Hitt¹,

Miroshnychenko²

2005

Plastics, Rubber and Composites

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Citation: HITT and MIROSHNYCHENKO, 2005 ABSTRACTThe mechanical properties of PVC sheets can be modified substantially by both uniaxial and biaxial stretching of the material above its glass transition temperature. Previous experimental studies have established a clear pattern in the relationship between tensile properties of oriented PVC products and imposed strains. Several mathematical models have been scrutinised to assess whether the established pattern of behaviour can be modelled and predicted. Of these, "the filament theory", proposed by Turner, emerged as the best candidate. The filament theory has been refined and developed further into "the composite model". In its present form it gives a good correlation between predicted and measured yield stress values of oriented rigid PVC sheets and is also capable of predicting the "established pattern" of property dependence upon imposed strain.

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Study of oriented polyvinyl chloride pipes by inner‐pressing expansion

Dong

Ren

et al. 2008

Adv Polym Technol

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Based on a new expansion technology for oriented polyvinyl chloride (PVC-O) pipes, the stress distribution in pipe wall during expansion and the efficiency of the heating process are analyzed theoretically. According to the results of theoretical calculation, the optimal parameter and strength variation for different expansion ratios are studied experimentally. Theoretical calculation results show that the hoop stress and radial stress in pipe wall are near-linearly distributed, and they are approximately equal. The heating efficiency is gotten by heat transfer calculations for different oil bath temperatures and heating times. After expansion, the intensity and Young's modulus are increased but elongation at break is reduced. All the variations in properties enlarge along with the raise of expansion ratio. Fine appearance and high-strength PVC-O pipe can be achieved by optimizing the expansion parameter.

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Biaxial orientation of poly(vinyl chloride) compounds: Interaction between drawing, structure, and properties

Cited by 18 publications

References 13 publications

X‐ray pole figures to assess orientation in PVC sheets

X‐ray pole figures to assess orientation in PVC sheets

Model to predict the mechanical behaviour of oriented rigid PVC

Study of oriented polyvinyl chloride pipes by inner‐pressing expansion

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