Thermal and shrinkage behaviour of stretched peroxide-crosslinked high-density polyethylene

Khonakdar, Hossein Ali; Morshedian, Jalil; Mehrabzadeh, M; Wagenknecht, Udo; Jafari, Seyed Hassan

doi:10.1016/s0014-3057(03)00076-4

Cited by 67 publications

(61 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9 The H-value was derived from the residual projected area of indentation according to H ¼ kP/d. 2 In this expression, d is the length of the impression diagonal in meters, P is the contact load applied in N, and k is a geometrical factor equal to 1.854. Loads of 0.25, 0.5, 1, and 2 N were used.…”

Section: Techniquesmentioning

confidence: 99%

“…1 In addition, crosslinked polyethylene (PE) is widely used in the wire and cable coating, and in the preparation of heat shrinkable materials. 2,3 PE is an easily crosslinking polymer, which is prepared by means of an organic peroxide capable of creating radicals by a decomposition reaction, or by irradiation with different doses of electron beam. 4,5 On the contrary, isotactic polypropylene (iPP) has been considered until very recently as a noncrosslinkable polymer.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure modification of isotactic polypropylene through chemical crosslinking: Toughening mechanism

Bouhelal¹,

Cagiao²,

Benachour³

et al. 2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

Reversibly crosslinked isotactic polypropylene (iPP) was prepared in the presence of dicumyl peroxide. The effects of the peroxide oxy-radicals in the melt were investigated in relation to the modification of the polymer. The dynamic rheology analysis of the crosslinking process was carried out by using a plastograph. The crosslinking reaction was evaluated by the Monsanto method. The resulting structure of the modified samples was studied by means of differential scanning calorimetry (DSC), wide-angle X-ray scattering (WAXS), microhardness, and mechanical properties. The degree of crystallinity of the modified iPP, derived from DSC and WAXS, remains almost unchanged, i.e., the crystalline structure is unaffected, though the lamellar thickness slightly decreases. The impact strength of the crosslinked iPP is greatly improved with reference to that of the unmodified material. A transition from brittle to ductile behavior appears in the modified iPP for all the crosslinking agents studied.

show abstract

Section: Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure modification of isotactic polypropylene through chemical crosslinking: Toughening mechanism

Bouhelal¹,

Cagiao²,

Benachour³

et al. 2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Heat shrinkable polymers have a wide application in the packaging industry, electrical power and electronic equipment, cable industry, and in the preparation of heat shrinkable tubes and connections. 2 It is shown that the crystalline domain of a polymer can be more oriented than the amorphous domain. On the other hand, results have shown that drawing results in the alignment of crystallites within the plain of the film, together with the formation of mesomorphous structure.…”

Section: Introductionmentioning

confidence: 99%

“…Mishra et al 23 have investigated the behavior of heat shrinkable polymer blends. Khonakdar et al 2,24 have studied shrinkage behavior of PE. But no work has been carried out on the parameters affecting PVC shrinkage behavior.…”

Section: Introductionmentioning

confidence: 99%

Additives effects on the shrinkage behavior of PVC sheets

Babaluo

2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

Despite the unique applications of heat shrinkable PVC sheets in food packaging industry, a few works have been carried out on the shrinkage behavior of this kind of sheets. So, in our work, investigation of the shrinkability of PVC sheets and influence of different parameters on the above-mentioned property has been focused, intensively. This paper presents the results of research aimed at characterizing the shrinkage behavior of PVC sheets, accompanied by the effect of different additives and their weight fractions on the shrinkability of the prepared sheets using experimental design Taguchi method. Also, shrinkage behavior of PVC sheets at optimum conditions has been studied and the stretching and shrinking temperature effects have been investigated. It was found that, among seven investigated variables, plasticizer has the most significant effect on the shrinkability of PVC sheets. Also, at optimum conditions, an increase in the stretching temperature can extensively influence the crystalline structure of the polymer and subsequently, shrinking temperature.

show abstract

“…Cross-linked thermoplastics (such as low-density polyethylene (LDPE) and ethylene-vinyl acetate copolymer (EVA), etc. ), [1][2][3][4][5][6] elastomer-plastic blends, [7,8] and segmented block copolymers [9,10] have gained considerable attention over the years from a heat shrinkability point of view. Recently polymer/layered silicate nanocomposites have attracted great interest since they frequently exhibit unexpected hybrid properties derived from their organic and inorganic counterparts.…”

Section: Introductionmentioning

confidence: 99%

Heat Shrinkable Behavior and Mechanical Response of a Low‐Density Polyethylene/Millable Polyurethane/Organoclay Ternary Nanocomposite

Mishra

Kim

2004

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Summary: A low‐density polyethylene (LDPE)/millable polyurethane (PU)/organoclay ternary nanocomposite was successfully prepared. The nanocomposites were characterized by X‐ray diffraction (XRD) and transmission electron microscopy (TEM). The nanocomposites, as evidenced by XRD, are intercalated. The heat shrinkable behavior of the nanocomposites, as well as their pristine counterparts, was studied. It was observed that heat shrinkability decreases with increased filler content. The tensile strength and the tensile modulus of the nanocomposites are higher than their pristine counterparts.The heat shrinkability of the unfilled LDPE/millable PU blend is highest and it decreases with increased nanofiller content.imageThe heat shrinkability of the unfilled LDPE/millable PU blend is highest and it decreases with increased nanofiller content.

show abstract

Thermal and shrinkage behaviour of stretched peroxide-crosslinked high-density polyethylene

Cited by 67 publications

References 13 publications

Structure modification of isotactic polypropylene through chemical crosslinking: Toughening mechanism

Structure modification of isotactic polypropylene through chemical crosslinking: Toughening mechanism

Additives effects on the shrinkage behavior of PVC sheets

Heat Shrinkable Behavior and Mechanical Response of a Low‐Density Polyethylene/Millable Polyurethane/Organoclay Ternary Nanocomposite

Contact Info

Product

Resources

About