Polymer Engineering and Science

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The effect of molecular weight distribution on polyethylene film properties
Polymer Engineering and Science - Tập 12 Số 5 - Trang 340-345 - 1972
Peter J. Perron, Peter B. Lederman
AbstractPolymer molecular weight heterogeneity affects the rheological properties of polymer melts such as melt viscosity, fracture and die swell. These rheological properties affect the conversion of the polymer from the bulk resin state to its final usable form. In this particular study, the effect of molecular weight distribution on polyethylene blown film chara...... hiện toàn bộ
Sintering rheology of amorphous polymers
Polymer Engineering and Science - Tập 21 Số 17 - Trang 1167-1170 - 1981
N. Rosenzweig, M. Narkis
AbstractThe activation energy for sintering of poly(methyl methacrylate) particle pairs is shown to be similar to their activation energy for Newtonian flow. Sintering progress with time is in good agreement with the Frenkel's coalescence theory. Typical sintering shear rates are shown to be very low and potential energy change (two particles) is small in compariso...... hiện toàn bộ
Study of processing parameters in fused deposition modeling based on mechanical properties of acrylonitrile‐butadiene‐styrene filament
Polymer Engineering and Science - Tập 59 Số 1 - Trang 120-128 - 2019
Bai Huang, Shuna Meng, Hui He, Yunchao Jia, XU Ying-bin, Huankun Huang
Four processing parameters, layer thickness, printing speed, raster angle, and building orientation were investigated in terms of their effects on mechanical properties, surface quality, and microstructure of acrylonitrile‐butadiene‐styrene (ABS) samples in fused deposition modeling (FDM) by orthogonal experiments. The results show that both the building orientation and the printing layer ...... hiện toàn bộ
Ceramic‐reinforced polymers and polymer‐modified ceramics
Polymer Engineering and Science - Tập 36 Số 24 - Trang 2905-2920 - 1996
J. E. Mark
AbstractThe composites discussed in this review are prepared using techniques similar to those used in the new sol‐gel approach to ceramics. Organometallis such as silicates, titanates, and aluminates are hydrolyzed in the presence of polymer chains (for example polysiloxanes and polyimides) that typically contain hydroxyl or amino groups. The functional groups are...... hiện toàn bộ
The determination of the fracture parameters for polymers in impact
Polymer Engineering and Science - Tập 15 Số 6 - Trang 470-477 - 1975
E. Plati, J. G. Williams
AbstractA method of analysis is given by which the critical strain energy release rate Gc for impact tests may be deduced for both Charpy and Izod tests from normal energy measurements. Suitable calibration factors are determined and the method is applied to a range of polymers. Very close a...... hiện toàn bộ
Mechanical and electrical properties of the PA6/SWNTs nanofiber yarn by electrospinning
Polymer Engineering and Science - Tập 54 Số 7 - Trang 1618-1624 - 2014
Jie Li, Long Tian, Ning Pan, Zhijuan Pan
In this article, continuous PA6/single‐wall nanotubes (SWNTs) nanofiber yarns were obtained by a special electrospinning method; the mechanical and electrical properties and the electric resistance‐tensile strain sensitivity of the as‐spun yarns were specially studied. The main parameters in the spinning process were systematically studied. Scanning electron microscope images and mechanica...... hiện toàn bộ
The behavior of thermosetting compounds in injection molding cavities
Polymer Engineering and Science - Tập 20 Số 13 - Trang 859-867 - 1980
Musa R. Kamal, M. E. Ryan
AbstractThe thermo‐mechanical history of thermosetting compounds in injection molding cavities influences the ultimate properties of molded articles and affects both moldability and the productivity of the process. Mathematical modeling is an attractive approach for obtaining information regarding the thermo‐mechanical history of the compound in the cavity. In orde...... hiện toàn bộ
Nonisothermal melt and cold crystallization kinetics of poly(aryl ether ether ketone ketone)
Polymer Engineering and Science - Tập 37 Số 3 - Trang 568-575 - 1997
Tianxi Liu, Zhishen Mo, Shanger Wang, Hongfang Zhang
AbstractAnalysis of the nonisothermal melt and cold crystallization kinetics of poly(aryl ether ether ketone ketone) (PEEKK) was performed by using differential scanning calorimetry (DSC). The Avrami equation modified by Jeziorny could describe only the primary stage of nonisothermal crystallization of PEEKK. And, the Ozawa analysis, when applied to this polymer sy...... hiện toàn bộ
Polymer blends containing poly(vinylidene fluoride). Part I: Poly(alkyl acrylates)
Polymer Engineering and Science - Tập 18 Số 9 - Trang 677-682 - 1978
D. C. Wahrmund, Roy Bernstein, J. W. Barlow, D. R. Paul
AbstractThe transitional behavior of poly(vinylidene fluoride) (PVF2) blends with poly(methyl acrylate) and with poly(ethyl acrylate) was examined by differential thermal analysis and dynamic mechanical testing. Both blend systems were judged to be miscible on the bases of the presence of single, composition dependent glass transitions and of t...... hiện toàn bộ
Polymer blends containing poly(vinylidene fluoride). Part II: Poly(vinyl esters)
Polymer Engineering and Science - Tập 18 Số 9 - Trang 683-686 - 1978
Roy Bernstein, Donald R. Paul, J. W. Barlow
AbstractBlends of poly(vinylidene fluoride) PVF2, with poly(vinyl acetate), PVAc; with poly(vinyl propionate), PVPr; and with poly(vinyl butyrate), PVBu, were prepared by solution blending. Solutions containing PVF2 with either PVPr or PVBu exhibited phase separation, and it was concluded that neither of these polymers are ...... hiện toàn bộ
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