Investigation of unsaturated polyester composites reinforced by aspen high‐yield pulp fibers

Abstract

Aspen chemithermomechanical pulp fiber-reinforced unsaturated polyester (UPE) composites were fabricated using premade paper handsheets. The effects of handsheet wet-pressing pressure, grammage, and subsequent fabrication methods on the composite properties were evaluated. The composites obtained using the optimum process parameters had tensile moduli and tensile strengths comparable with those of traditional glass fiber-reinforced UPE composites. The pressed composites had very consistent tensile moduli that were well fitted by the Halpin-Tsai and Tsai-Pagano models. The classical Kelly-Tyson and Bowyer-Bader models significantly underestimated the composite tensile strengths and the potential reasons for this discrepancy are discussed. POLYM. COMPOS.,

Structural Characterization and Analysis of High-Strength Laminated Composites from Recycled Newspaper and HDPE

“…Polymer laminated paper composites could effectively avoid the fiber length reduction and thus displayed high mechanical properties [16,17,18,19,20]. Paper fibers were prefabricated into mats, which were subsequently stacked with thermoplastic polymer films or impregnated with a liquid matrix.…”

“…This preparation process not only avoided the damage to paper fibers but also obtained a composite structure where the fiber orientation factor increased from 1/5 to 3/8 [21]. Paper hand-laminas impregnated with resin were used to prepare pulp fiber-reinforced unsaturated polyester composites, which had tensile moduli and tensile strength comparable with those of glass fiber-reinforced composites [16]. The maximum composite tensile strength was up to 121 MPa when combing wet-laid paper-making process with polylactic acid film stacking process [21].…”

Investigation of the tensile properties of natural and natural/synthetic hybrid fiber woven fabric composites

“…It is often observed that an increase in fiber loading leads to an enhancement in tensile properties. 11,12 The mechanical properties of natural fibers vary greatly with the age of the plant from which they are derived, geographical location, climatic growth conditions, the harvesting method employed, the retting and combing techniques applied etc., 13 unlike those of synthetic fibers. The variability of these mechanical properties, the compatibility between the matrix and natural fibers and moisture absorption 14 are the principal disadvantages that may prevent the large-scale production of natural fiber composites.…”

“…It is often observed that an increase in fiber loading leads to an enhancement in tensile properties. 11,12…”

Large stabilizing effect of titanium dioxide on photodegradation of PVC/α‐methylstyrene‐acrylonitrile copolymer/impact modifier‐matrix composites

“…However, since the factors like nontoxic, nonvolatile, light, chemical, and thermal stability, and price should be fully considered, the inorganic substance may be more suitable for enhancing the UV resistance. In addition, mixing polymers with inorganic fillers could provide polymers with additional excellent reinforcement, electrical conductivity, and other properties . Thus, it is reasonable to incorporate inorganic fillers into polymer matrix.…”