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Title: Improved adhesion of polyurethane-based nanocomposite coatings to tin surface through silane coupling agents

Journal Article · · International Journal of Adhesion and Adhesives
 [1];  [2];  [2];  [2];  [1]
  1. State Univ. of New York (SUNY), Binghamton, NY (United States)
  2. Kansas City National Security Campus (KCNSC), Kansas City, MO (United States)
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Conformal coatings with higher adhesion strength is critical for mitigating the growth of whiskers from the pure tin (Sn) or Sn-rich surfaces of the Pb-free electronics. Silane coupling agents have the ability to form a durable bond between polymeric coatings and metallic materials. The main goal of this paper is to investigate the effect of silane agents on the adhesion behavior of polyurethane (PU), polyurethane acrylate (PUA) and both coatings filled with silicone rubber (SR) nanoparticles on the tin solder pads. It was found that an isocyanate-based silane provided excellent adhesion for PU and PU + SR coatings and an acrylic-based silane for PUA and PUA + SR coatings on the tin surface. This was due to the reaction bond formation between the silane coupling agent and the coating. Hence, the selection of silane coupling agents with the organofunctional group similar to the coating material is crucial to improve the adhesion properties of the coating.

Research Organization:
Kansas City Nuclear Security Campus (KCNSC), Kansas City, MO (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NA0002839
OSTI ID:
1843191
Alternate ID(s):
OSTI ID: 1811546
Report Number(s):
NSC-614-2926
Journal Information:
International Journal of Adhesion and Adhesives, Vol. 110; ISSN 0143-7496
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (14)

Improved adhesion of polyurethane-based coatings to tin surface journal March 2019
Real-time SEM/FIB studies of whisker growth and surface modification journal July 2010
Adhesion and Puncture Strength of Polyurethane Coating Used to Mitigate Tin Whisker Growth journal May 2014
Effect of coating adhesion and degradation on tin whisker mitigation of polyurethane-based conformal coatings journal August 2019
Synthesis methods, chemical structures and phase structures of linear polyurethanes. Properties and applications of linear polyurethanes in polyurethane elastomers, copolymers and ionomers journal August 2007
Comparison of thermal/mechanical properties and shape memory effect of polyurethane block-copolymers with planar or bent shape of hard segment journal May 2003
Impact of Conformal Coating Material on the Long-Term Reliability of Ball Grid Array Solder Joints journal January 2019
Preparation, Characterization and Application of UV-Curable Flexible Hyperbranched Polyurethane Acrylate journal October 2017
Enhanced mechanical properties of polyurethane composite coatings through nanosilica addition journal January 2016
How to speed up the UV curing of water-based acrylic coatings journal April 2004
Recent Advances in Mitigation of Whiskers from Electroplated Tin journal December 2019
Hydrogen bonding and mechanical properties of thin films of polyether-based polyurethane–silica nanocomposites journal October 2010
Effects of curing conditions on structural evolution and mechanical properties of UV-curable polyurethane acrylate coatings journal January 2018
Organic-Rich Hybrid O/I Systems Based on Isocyanate Chemistry journal January 1996

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