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Search Publications by: Joannie Chin (Fed)

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Displaying 1 - 25 of 61

Long term stability of ultra high molar mass polyethylene fibres

September 19, 2016
Author(s)
Amanda L. Forster, Aaron M. Forster, Joannie W. Chin, Sylvain H. Petit, Kai-Li Kang, Nicholas G. Paulter Jr., Kirk D. Rice, Don Jenket II, Mohamad Al-Sheikhly
Abstract. The performance of ultra-high molar mass polyethylene (UHMMPE) fibres for ballistic protection is predicated on the development of a highly aligned molecular structure that allows the polymer to exhibit a superior strength in the axial direction

Long-Term Stability of UHMWPE Fibers

February 18, 2015
Author(s)
Amanda L. Forster, Aaron M. Forster, Joannie W. Chin, Chiao-Chi Lin, Sylvain H. Petit, Kai-Li Kang, Nicholas G. Paulter Jr., Michael A. Riley, Kirk D. Rice
The superior performance of ultra-high molecular weight polyethylene fi bers is predicated on the development of a highly aligned molecular structure that allows the polymer to exhibit a superior strength in the axial direction of the fi ber. Body armor

Characterization of Airborne Nanoparticle Released from Consumer Products

August 29, 2013
Author(s)
Li Piin Sung, Joannie W. Chin, Andrew K. Persily
This interim report summarizes research results to date under the FY2012 interagency agreement between CPSC and NIST to develop testing and measurement protocols for determining the quantities and properties of nanoparticles released from flooring finishes

Characterization of Surface Accumulation and Release of Nanosilica During Irradiation of Polymer Nanocomposites with Ultraviolet Light

August 12, 2012
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Savelas A. Rabb, Paul E. Stutzman, Justin M. Gorham, Xiaohong Gu, Lee L. Yu, Joannie W. Chin
Nanofillers are increasingly used for enhancing multiple properties of polymeric materials in many applications. However, polymers are susceptible to photodegradation by solar ultraviolet (UV) radiation Therefore, nanofillers in a polymer nanocomposite

More Durable or Vulnerable? --- Effect of Nanoparticles on Long-Term Performance of Polymeric Nanocomposites during UV Exposure

July 2, 2012
Author(s)
Xiaohong Gu, Minhua Zhao, Stephanie S. Watson, Tinh Nguyen, Joannie W. Chin, Jonathan W. Martin, Dongmei Zhe, Guodong Chen
Polymers are widely used as exterior coatings in buildings, bridges, aircrafts, and automobiles for both protection and aesthetic purposes. However, the sustainability and service life of the applied coatings is limited due to the photodegradation of

Fate of nanoparticles during life cycle of polymer nanocomposites

July 6, 2011
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Xiaohong Gu, Justin M. Gorham, Paul E. Stutzman, Deborah S. Jacobs, Walter E. Byrd, John W. Hettenhouser, Joannie W. Chin
Nanoparticles are increasingly used in consumer and structural polymeric products to enhance a variety of properties. Under the influences of environmental factors (e.g., ultraviolet, moisture, temperature) and mechanical actions (e.g., scratching

Role of Nanoparticles in Life Cycle of Nanocomposites

June 15, 2010
Author(s)
Xiaohong Gu, Guodong Chen, Minhua Zhao, Stephanie S. Watson, Paul E. Stutzman, Tinh Nguyen, Joannie W. Chin, Jonathan W. Martin
The objective of this study is to investigate the role of ZnO nanoparticles in the life cycle of a waterborne polyurethane (PU) nanocomposite during UV exposure. The effects of loadings and sizes of ZnO nanoparticles on photodegradation of ZnO/PU films

Ultraviolet Weathering of Firefighter Protective Clothing

June 4, 2010
Author(s)
Rick D. Davis, Joannie W. Chin, Chiao-Chi Lin, Sylvain H. Petit
Exposure to simulated ultraviolet sunlight at 50 C and 50 % relative humidity caused a significant deterioration in the mechanical performance of polyaramid and polyaramid/polybenzimidazole based Outer Shell fabrics used in firefighter jacket and pants

Degradation and Nanoparticle Release of Nanocomposite Coatings Exposed to UV Radiation

June 2, 2010
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Xiaohong Gu, Justin M. Gorham, Paul E. Stutzman, Alexander J. Shapiro, Walter E. Byrd, Joannie W. Chin
The release of nanoparticles from nanocomposite coatings during their life cycle potentially has negative effects to the environments and presents a roadblock to their uses. The degradation and nanoparticle release of amine-cured epoxy coatings containing

Hydrolytic stability of polybenzobisoxazole and polyterephthalamide body armor.

May 6, 2010
Author(s)
Amanda L. Forster, Guillaume Messin, Kirk D. Rice, Pierre Pintus, Joannie W. Chin, Sylvain H. Petit
Previous work conducted at the National Institute of Standards and Technology (NIST) to investigate the field failures of soft body armor containing the material poly(p-phenylene-2,6-benzobisoxazole), or PBO, revealed that this material was susceptible to

Direct Evidence of Nanoparticle Release from Epoxy Nanocomposites Exposed to UV Radiation

April 14, 2010
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Xiaohong Gu, Justin M. Gorham, Paul E. Stutzman, Alexander J. Shapiro, Walter E. Byrd, Joannie W. Chin
This study assessed the fate of SiO2 nanoparticles (nanoSiO2) in epoxy/nanoSiO2 composites exposed to ultraviolet (UV) radiation. The matrix was a stoichiometric mixture of adiglycidyl ether of bisphenol A epoxy and an aliphatic tri-amine. Films of

NIST Sustainable Infrastructure Material Program

March 17, 2010
Author(s)
Jonathan W. Martin, Xiaohong Gu, Tinh Nguyen, Joannie W. Chin
NIST has initiated a research program for improving the quality of the data input for making economic sustainability assessments of polymeric infrastructure materials through improvements in the measurement science for this data. Sustainability assessments

Water based Polyurethane Graphene Oxide Nanocomposites

March 3, 2010
Author(s)
Coralie Bernard, Tinh Nguyen, Bastien T. Pellegrin, Mat Celina, Alexander J. Shapiro, Deborah Jacobs, Kar T. Tan, Sungjin Park, R. S. Ruoff, Joannie W. Chin
Graphene oxides are potentially a new class of nanomaterial to enhance multifunctional properties of polymers because of their remarkable thermal conductivity, mechanical strength, and more importantly, low cost. The graphene oxides, produced by

Development of Soft Armor Conditioning Protocols for NIJ 0101.06: Analytical Results

September 24, 2009
Author(s)
Amanda L. Forster, Kirk D. Rice, Michael A. Riley, Guillaume Messin, Sylvain H. Petit, Cyril Clerici, Gale A. Holmes, Joannie W. Chin
This publication details the four major phases of analytical development work, coupled with several additional side studies, undertaken by the Office of Law Enforcement Standards in writing the Flexible Armor Conditioning Protocol in NIJ 0101.06. This

Studying Long-term Performance of a Nano-ZnO filled Waterborne Polyurethane Coating using Spectroscopies and Microscopies

September 9, 2009
Author(s)
Xiaohong Gu, Dongmei Zhe, Stephanie S. Watson, Guodong Chen, Minhua Zhao, Paul E. Stutzman, Deborah S. Jacobs, Tinh Nguyen, Joannie W. Chin, Jonathan W. Martin
Although inorganic UV absorbers such as zinc oxide (ZnO) and cerium oxide (CeO2) exhibit numerous advantages compared to organic UV absorbers, the mechanisms of how these nanoparticles affect the long-term performance of polymeric coatings are less than

Degradation and Nanofiller Release of Polymer Nanocomposites Exposed to UV

July 15, 2009
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Alexander J. Shapiro, Xiaohong Gu, Joannie W. Chin
Nanofillers are increasingly used to enhance multifunctional properties of polymers. However, recent research suggests that nanomaterials may have a negative impact on the environmental health and safety. Since polymers are susceptible to photodegradation