Robert S. Maxwell

Portrait of Robert S. Maxwell

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  • Email
    maxwell7@llnl.gov
  • Phone
    (925) 423-4991
  • Organization
    Not Available

Research Interests

  • The development and characterization of novel materials and synthesis and manufacturing processes (including Additive Manufacturing) to meet the needs of the laboratories national security sponsors
  • The development and use of nuclear magnetic resonance (NMR) methods to the study of the structure and dynamics of materials, including glasses, ceramics, polymers, and composites
  • The application of experimental and computational methods to gain fundamental understanding of material aging and degradation mechanisms
  • Understanding the role of interfacial interaction on dissolution kinetics of silica polymorphs and fate and transport of contaminants

Ph.D., Chemistry, University of California at Santa Barbara, 1993

B.S., Chemistry, University of California at Davis, 1988

  1. Sawvel, A. M.; Chinn, S.; Gee, M.; Loeb, C. K.; Maiti, A.; Mason, H. E.; Maxwell, R. S.; Lewicki, J. P. Nonideality in Silicone Network Formation via Solvent Swelling and H-1 Double-Quantum NMR MACROMOLECULES, 52, 2, 41-419;  (2019)
  2. Sangalang, Elizabeth; Sharma, Hom; Saw, Cheng; Gollott, Rory; Matt, Sarah; Wilson, Thomas; McLean, William; Maxwell, Robert; Dinh, Long; Hydrogen Uptake Kinetics of 1,4-bis(phenylethynyl)benzene (DEB) Rubberized Coating on Silicone Foam Substrate; ACS Applied Materials & Interfaces 12, 3993-4001(2019)
  3. Armstrong, MR; Grivickas, PV; Sawvel, AM; Lewicki, JP; Crowhurst, JC; Zaug, JM; Radousky, HB; Stavrou, E; Alviso, CT; Hamilton, J.; Maxwell, R. S.; Ultrafast Shock Compression of PDMS-Based Polymers JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,56, 11, 827-832 DOI: 10.1002/polb.24589  (2018)
  4. Rodriguez, J. N.; Alviso, C. T.; Fox, C. A.; Maxwell, R. S.; Lewicki, J. P.; NMR Methodologies for the Detection and Quantification of Nanostructural Defects in Silicone Networks MACROMOLECULES, 51,5, 1992-2001DOI: 10.1021/acs.macromol.7b02197 (2018)
  5. Weisgraber, T. H.; Metz, T.; Spadaccini, C. M.; Duoss, E. B.; Small, W.; Lenhardt, J. M.; Maxwell, R. S.; Wilson, T. S.; A mechanical reduced order model for elastomeric 3D printed architectures JOURNAL OF MATERIALS RESEARCH 33,3,: 309-316 DOI: 10.1557/jmr.2017.483 (2018)
  6. Sharma, H.N., Lenhardt, J. M., Loui, A., Allen, P.G., Mclean, W., Maxwell, R.S., Dinh, L. N., Moisture outgassing from siloxane elastomers containing surface-treated silica fillers, NPJ Materials Degradation 3, 21(2019)
  7. Hom N. Sharma, Elizabeth Sangalang, Cheng Saw, Gareth A. Cairns, Chris D. Entwistle, William McLean, Robert S. Maxwell, and Long N. Dinh, Volatility of the catalytic hydrogenation products of 1,4 bis(phenylethynyl)benzene J Chem Phys., 147, 194701 (2017)
  8. Hom N. Sharma, William McLean II, Robert S. Maxwell, and Long N. Dinh The Moisture Outgassing Kinetics of a Silica Reinforced Polydimethylsiloxane, J. Chem. Phys., 145(11) 114905 (2016)
  9. H. E. Mason, J. D. Begg, R. S. Maxwell, A. B. Kersting, and M. Zavarin, A novel solid-state NMR method for the investigation of trivalent lanthanide sorption on amorphous silica at low surface loadings, Env. Sci: Proc and Imp. 18, 7, 802-809  (2016)
  10. A. Maiti, W. Small, J. Lewicki, T. H. Weisgraber, E. B. Duoss, S. C. Chinn, M. A. Pearson, C. M. Spadaccini, R. S. Maxwell, and T. S. Wilson; Microarchitecture matters! 3D Printed cellular solid outperforms stochastic foam in the long term, (2016) Scientific Reports 6,  24871 (2016) Dinh, L. N., Cairns, G. A., Strickland, R. A., McLean, W. II, Maxwell R. S., Mechanism and Kinetic Modelling of Hydrogenation in the Organic Getter/Palladium Catalyst/Activated Carbon Systems, J. Phys. Chem. A. 2015, 119, 943-951; DOI: 10.1021/jp511052a
  11. Harley, S. J.; Glascoe, E. A.; Lewicki, J. P.; Maxwell, R. S.; Advances in Modeling Sorption and Diffusion of Moisture in Porous Reactive Materials CHEMPHYSCHEM 15, 9, 1809-1820 DOI: 10.1002/cphc.201301097 (2014)
  12. Lewicki, J. P.; Pielichowski, K; Jancia, M.; Hebda, E.; Albo, R. L. F.; Maxwell, R. S. Degradative and Morphological Characterization of POSS Modified Nanohybrid Polyurethane Elastomers, Polymer Degradation and Stability, 104, 50-56 (2014)
  13. Lewicki, J. P.; Beavis, P. W.; Robinson, M. W. C.; Maxwell, R. S. A Dielectric Relaxometry Study of Segmental Dynamics in PDMS/Boron Composite and Hybrid Elastomers. Polymer 55, 1763-68 (2014)
  14. Lewicki, J. P.; Worsely, M. A.; Albo, R., Finnie, J. A.; Ashmore, M. J.; Mason, H. E.; Baumann, T. F.; Maxwell, R. S. The Effects of Highly Structured Low Density Carbon Nanotube Networks on the Thermal Degradation Behaviour of Polysiloxanes, Poly. Deg. Stabil., 102 , 25-32 (2014)
  15. Lewicki, J. P.; Harley, S. J.; Loui, A.; Pielichowski, K.; Mayer, B. P.; Janowski, B.; Maxwell, R. S.; The Influence of Polyhedral Oligomeric Silsequioxanes on Domain Microstructure in Polyurethane Elastomers SILICON Volume: 5 Issue: 3 Pages: 205-212 JUL 2013
  16. Duoss, E. B.; Hearon, K.; Weisgraber, T. H.; Wilson, T. S.; Vericella, J.; Zhu, C.; Barth, H.; Small, W. IV; Metz, T.; Kuntz, J. D.; Spadaccini, C. M.; Maxwell, R. S.; Three-dimensional printing of porous, elastomeric micro-architectures with negative stiffness, Advanced Funtional Materials, 2014, 24, 4905–4913
  17. Maiti, A., Small, W., Gee, R. H., Weisgraber, T. H., Wilson, T. S., Maxwell, R. S., Mullins Effect in a Filled Elastomer under uniaxial tension, Phys. Rev. E., 89, 012602 (2014)
  18. Harley, S., Mayer, B., Lewicki, J., Maxwell R. S., Glascoe, E., Quantification of free volume changes associated with compression set in flurosilicone o-rings through Xe-129 NMR, Silicon, 5 205-212(2013)
  19. L. N. Dinh, G. A. Cairns, R. Krueger, R. S. Maxwell, Aging aspects of DEB getters, J. Nuc. Materials, 442, 298-305 (2013)
  20. B. P. Mayer, S. C. Chinn, R. S. Maxwell, J. A. Reimer, Probing the Silica/Polysiloxane Interface: A Solid State NMR Investigation of γ-Irradiated Composite Materials, Polymer Degradation Stability 98, 7, 1362-1368 (2013).
  21. Patel, M., Netherton, D., Jones, B., Bowditch, M., Khan, N., Letant, S., Maxwell, R. S., Bernstein, R., Birdsell, S., Volatile outgassing characteristics of highly filled ethylene vinyl acetate binder materials: gas phase infra-red spectroscopy results, Poly. Test. 32, 313-320 (2013)
  22. Lewicki, J. P, Albo R. L. F., Alviso, C. T., Maxwell, R. S. "Pyrolysis-gas chromatography/mass spectrometry for the forensic fingerprinting of silicone engineering elastomers" Journal of Analytical and Applied Pyrolysis, 99 (2013) 85–91
  23. Harley, S., Glascoe, E., Maxwell, R. S., Thermodynamic Study on dynamic Water Vapor Sorption in Sylgard-184, J. Phy. Chem. B. (2012), 116 (48) 2806-2812
  24. B. P. Mayer, J. P. Lewicki, S. C. Chinn, G. Overturf, R. S. Maxwell, Nuclear magnetic resonance and principal component analysis for investigating the degradation of poly[chlorotrifluoroethylene-co-(vinylidene fluoride)] by ionizing radiation, Polymer Degradation and Stability, 2012 , 97, 1151-1157
  25. H. E. Mason, S. J. Harley, R. S. Maxwell, and S. A. Carroll, Probing the surface structure of divalent transition metals using surface specific solid-state NMR spectroscopy, Env. Sci. Tech., 2012, 46 (5), pp 2806–2812.
  26. J. P. Lewicki, B. P. Mayer, C. T. Alviso and R. S. Maxwell, Thermal Degradation Behavior and Product Speciation in Model Poly(dimethlysiloxane) Networks, J. Inorg. Organomet. P. 22, 3, 636-645 (2012).
  27. B. P. Mayer, J. P. Lewicki, T. Weisgraber, W. Small, T. S. Wilson, R. S. Maxwell. Predicting Elastic Moduli of Poly(dimethylsiloxane) Networks Using Combined Multiple Quantum Nuclear Magnetic Resonance and Mesoscale Modeling. Macromolecules 2011, 44 (20), 8106–8115.
  28. A. Maiti, T. Weisgraber, R. H. Gee, W. Small, C. Alviso, S. C. Chinn, and R. S. Maxwell, Radiation-induced mechanical property changes in filled rubber, Phys. Rev. E, 83(6) 062801 (2011).
  29. Letant, S. E., Plant, D. F., Wilson, T. S., Alviso, C. T., Read, M. S. D., Maxwell, R. S., De-acetlyation mechanism of crosslinked ethylene-vinyl acetate- vinyl alcohol (EVA-OH) terpolymers subjected to high temperatures and/or gamma radiation doses, Poly. Deg. And Stab., 96 (11), 2011, 2019-2028.
  30. Mason, H.; Carroll, S. A.; Maxwell, R. S.; The Formation of metastable aluminosilicates in Al-Si-H2O systems: Results from solution chemistry and solid-state NMR spectroscopy, Geochim. Cosmochim. Acta, 75 (20), 15, 2011, pp 6080-6093.
  31. Dinh, L.; Mayer, B. P.; Maiti, A.; Chinn, S. C.; Maxwell, R. S.; Molecular Weight Distributions Of Irradiated Siloxane-Based Elastomers: A Complementary Study By Statistical Modelling And Multiple Quantum Nuclear Magnetic Resonance, J Appl. Phys, 109, 094905 (2011).
  32. Maiti, A.; Weisgraber, T.; Dinh, L. N.; Gee. R. H.; Wilson, T.; Chinn, S. C.; Maxwell, R. S.; Controlled Manipulation Of Elastomers With Radiation: Insights From Multiquantum Nuclear-Magnetic Resonance Data And Mechanical Measurements, Phys. Rev. E, 83 031802 (2011).
  33. Patel, M.; Chinn, S. C., Wilson, T., Birdsell, S., Maxwell, R. Compression Set In Gas-Blown Condensation-Cured Polysiloxane Elastomers, Poly. Deg. Stab. 95, 12, 2499-2507 (2010).
  34. Chinn, S. C.; Wilson, T.; Alviso, C.; Berman, E.; Maxwell, R. S.; Characterization of Radiation-Induced Degradation of Sylgard 184; J. Phys. Chem B, 114, 30, 9729-9736 (2010)
  35. Letant, S.; Maiti, A.; Jones, T. V.; Herberg, J.; Maxwell, R. S.; Saab, A. P.; Polyhedral Oligomeric Silsesquioxane (POSS)-Stabilized Pd Nanoparticles: Factors Governing Crystallite Morphology and Secondary Aggregate Structure, J. Phys. Chem. C, 113, 19424-19431 (2009).
  36. Weisgraber, T. H.; Gee, R. H.; Maiti, A.; Clague, D. S.; Chinn, S. C.; Maxwell, R. S.; A Mesoscopic Network Model For Permanent Set In Corsslinked Elastomers, Polymer, 50, 5613-5617 (2009).
  37. Baumann, T. F.; Jones, T. V.; Wilson, T.; Saab, A.P.; Maxwell, R. S.; Synthesis and Characterization of Novel PDMS-POSS Nanocomposites Using POSS derivatives as Cross-linking Filler, J. Poly. Sci. A, 47, 2589-2596 (2009).
  38. Mayer, B.; Reimer, J.; Maxwell, R. S.; Chinn, S.; Characterizing Radiation-Aged Polysiloxane-Silica Composites: Identifying Changes in Network Topology via 1H NMR Chem. Eng. Sci, 64, 4684-4692 (2009).
  39. Houston, J.; Maxwell, R. S.; Carroll, S. A.; Transformation of meta-stable calcium silicate hydrates to tobermorite: Reaction pathways from water chemistry, XRD, and NMR spectroscopy, Geochemical Transactions (2009) 10, 1-14.
  40. Maiti, A.; Gee, R.; Chinn, S. C.; Maxwell, R. S.; Constitutive Modeling Of Radiation Effects On The Permanent Set In A Silicone Elastomer, Poly. Deg. Stab (2008) 93 2008, 2226-2229
  41. Lacevic, N.; Gee, R.; Saab, A.; Maxwell, R. S.; Computational Exploration Of Polymer Nanocomposite Mechanical Property Modification Via Crosslinking Topology, J. Chem. Phys., 129, 124903, 2008.
  42. Lewicki, J. P.; Maxwell, R. S.; Patel, M.; Herberg, J. L; Swain, T.; Liggat, J. L.; Pethrick, R. A.; Effect of meta-Carborane on Segmental Dynamics in a Bimodal Poly(dimethylsiloxane) Network, Macromol., 2008, 41 (23), 9179-9186
  43. Houston, J. R.; Herberg, J. L.; Carroll, S. A.; Maxwell, R. S.; Association of Dissolved Al(III) With Silica: Connecting Molecular Structure To Surface Reactivity Using NMR, Geochimica Chem Acta, 72, 3326-3337 (2008)
  44. Mayer, B.; Reimer, J.; Maxwell, R.S.; A Methodology for the Indirect Determination and Spatial Resolution of Shear Modulus of PDMS-Silica Elastomers, Macromol., 2008; 41(4); 1323-1327.
  45. Giuliani, J. R.; Gjersing, E.; Chinn, S. C.; Maxwell, R. S.; "Thermal Degradation In Endlinked, Nonstochiometric Reacted PDMS Networks By 1H Multiple Quantum NMR", J. Phys. Chem., B., 111, 12977-12984 (2007).
  46. Demas, V.; Giuliani, J. R.; Malba, V.; Berhardt, A.; Evans, L.; Harvey, C.; Chinn, S. C.; Maxwell, R. S.; Reimer, J. A.; Pines, A.; "Portable, Low-cost NMR with Laser-Lathe Lithography produced microcoils" J. Mag. Res. 189( 1), 2007, 121-129
  47. Maiti, A.; Gee, R. H.; Maxwell, R. S.; Saab, A. P.; Hydrogen Catalysis And Scavenging Action Of Pd-POSS Nanoparticles. Chem. Phys. Lett., (2007). COVER
  48. Gjersing, E.; Chinn, S. C.; Maxwell, R. S.; Giuliani, J. R.; Giuliani, J. R.; Eastwood, E.; Bowen, D.; Stephens, T.; "Investigation Of Network Heterogeneities In Endlinked, Nonstocihimmetric Reacted PDMS Networks By 1H Multiple Quantum NMR", Macromol, 40, 4953-4962 (2007).
  49. Evans, W. J.; Lipp, M. J.; Yoo, C.-S.;Cynn, H.; Herberg, J. L; Maxwell, R. S.; Nichol, M. F.; "Pressure-Induced Polymerization of Carbon Monoxide: Disproporionation and Synthesis of an Energetic Lactonic Polymer" Chem Mater 18, 2520-2531, (2006).
  50. Lacevic, N.; Maxwell, R. S.; Saab, A. P.; Gee, R. H.; "Molecular Dynamics Simulations of Ordering of Poly(dimethylsiloxane) under Uniaxial Stress", J. Phys. Chem. B, 110, 3588 3594, (2006).
  51. Maiti, A.; Gee, R. H.; Maxwell, R. S.; Saab, A. P.; "Mixed Aromatic Alkyne System on a Pd Surface: A First Principles Study", J. Phys. Chem. B, 110, 3499 3503, (2006).
  52. Patel, M.; Swain, A. C.; Cunningham, J. L.; Maxwell, R. S.; Chinn, S. C.; "The stability of poly (m carborane siloxane) elastomers exposed to heat and gamma radiation", Poly. Deg. Stab, 91, 548 554, (2006).
  53. Paravastu, A. K.; Coles, P. J.; Reimer, J. A.; Ladd, T. D.; Maxwell, R. S.; "Photocurrent modulated optical nuclear polarization in bulk GaAs", Appl. Phys. Lett., 87, 232109, (2005).
  54. Pless, J. D.; Maxwell, R. S.; Philips, M. L. F.; Helean, K. B.; Axness, M. Y.; Nenoff, T. A.; "Structure property relationship of permutite like amorphous silicates, Nax+2yMx3+Si1-xO2+y (M3+ = Al, Mn, Fe, Y), for ion exchange reactions", Chem Mater., 17, 5101 5108, (2005).
  55. Maxwell, R. S.; Chinn, S. C.; Solyom, D.; Cohenour, R.; "Radiation induced cross linking in a silica filled silicone elastomer as investigated by multiple quantum H 1 NMR", Macromol, 38, 7026 7032, (2005).
  56. Sawvel, A. M.; Chinn, S. C.; Bourcier, W. L.; Maxwell, R. S., "Local structure of amorphous (PbO)(x)[(B2O3)(1 z)(Al2O3)(z)](y)(SiO2)(y) dielectric materials by multinuclear solid state NMR", Chem Mater, 17, 1493 1500, (2005).
  57. Baumann, T. F.; Gash, A. E.; Chinn, S. C.; Sawvel, A. M.; Maxwell, R. S.; Satcher, J. H., "Synthesis of high surface area alumina aerogels without the use of alkoxide precursors", Chem Mater, 17, 395 401, (2005).
  58. Coleman, S. J.; Coronado, P. R.; Maxwell, R. S.; Reynolds, J. G.; "Granulated activated carbon modified with hydrophobic silica aerogel potential composite materials for the removal of uranium from aqueous solutions", Environ. Sci. Tech., 37, 2286 2290, (2003).
  59. Malba, V.; Maxwell, R. S.; Evans, L. B.; Bernhardt, A. E.; Cosman, M.; Yan, K.; "Laser lathe lithography a novel method for manufacturing nuclear magnetic resonance microcoils", Biomed. Microdev, 5, 21 27, (2003).
  60. Suratwala, T. I.; Hanna, M. L.; Miller, E. L.; Whitman, P. K.; Thomas, I. M.; Ehrmann, P. R.; Maxwell, R. S.; Burnham, A. K., "Surface chemistry and trimethylsilyl functionalization of Stober silica sols", J Non Cryst Sol, 316, 349 363, (2003).
  61. Maxwell, R. S.; Balazs, B.; "Residual dipolar coupling for the assessment of cross link density changes in gamma irradiated silica PDMS composite materials", J. Chem Phys, 116, 10492 10502, (2002).
  62. Carroll, S. A.; Maxwell, R. S.; Bourcier, W.; Martin, S.; Hulsey, S.; "Evaluation of silica water surface chemistry using NMR spectroscopy", Geochimica Chem Acta, 66, 913 926, (2002).