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Effects of different ammonium lignosulfonate contents on the crystallization, rheological behaviors, and thermal and mechanical properties of ethylene propylene diene monomer/polypropylene/ammonium lignosulfonate composites, TAPPI Journal January 2020

ABSTRACT: Thermoplastic elastomer (TPE), made from ethylene propylene diene monomer (EPDM) and polypropylene (PP) based on reactive blending, has an excellent processing performance and characteristics and a wide range of applications. However, there are currently no reports in the literature regarding the usage of TPE in making composite boards. In this paper, EPDM, PP, and ammonium lignosulfonate (AL) were used as the raw materials, polyethylene wax was used as the plasticizer, and a dicumyl peroxide vulcanization system with dynamic vulcanization was used to make a new kind of composite material. This research studied the influences of the AL contents on the crystallization behaviors, rheological properties, thermal properties, and mechanical properties of the composites. The results showed that the AL content had a noticeable impact on the performance of the composite board. Accordingly, this kind of composite material can be used as an elastomer material for the core layer of laminated flooring.

Understanding extensibility of paper: Role of fiber elongation and fiber bonding, TAPPI Journal March 2020

ABSTRACT: The tensile tests of individual bleached softwood kraft pulp fibers and sheets, as well as the micro-mechanical simulation of the fiber network, suggest that only a part of the elongation potential of individual fibers is utilized in the elongation of the sheet. The stress-strain curves of two actual individual pulp fibers and one mimicked classic stress-strain behavior of fiber were applied to a micromechanical simulation of random fiber networks. Both the experimental results and the micromechanical simulations indicated that fiber bonding has an important role not only in determining the strength but also the elongation of fiber networks. Additionally, the results indicate that the shape of the stress-strain curve of individual pulp fibers may have a significant influence on the shape of the stress-strain curve of a paper sheet. A large increase in elongation and strength of paper can be reached only by strengthening fiber-fiber bonding, as demonstrated by the experimental handsheets containing starch and cellulose microfibrils and by the micromechanical simulations. The key conclusion related to this investigation was that simulated uniform inter-fiber bond strength does not influence the shape of the stress-strain curve of the fiber network until the bonds fail, whereas the number of bonds has an influence on the activation of the fiber network and on the shape of the whole stress-strain curve.

Wood Quality Factors in Loblolly Pine

Wood Quality Factors in Loblolly Pine

Industrial Environmental Control Pulp and Paper Industry, Second Edition, (Spanish)

Industrial Environmental Control Pulp and Paper Industry, Second Edition, (Spanish)

2025 TAPPI Aqueous Barrier Coating for Paper and Paperboard Course

This course provides a solid foundation in the development and application of aqueous-based barrier coatings for paper and paperboard packaging. Through a practical, hands-on approach, participants will gain a clear understandingof the chemistry, application techniques, and performance attributes of these environmentally friendly coatings

Coatings Enabling Plastics to Paper Transformation, TAPPICon25

Applications and Results for Camera Based Solutions for Identifying Safe and Unsafe Work Zones in Paper Mills, TAPPICon25

Pre-Damping Effects on Water Absorption and Drying Dynamics in Flexographic Printing, TAPPICon25

Sweetening and Intermediate Liquor Impacts on Evaporator Performance, TAPPICon25

An Innovative Helical Yankee Hood Design for Improved Profiling, TAPPICon25