skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Exploiting Molecular Weight Distribution Shape to Tune Domain Spacing in Block Copolymer Thin Films

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.8b00694· OSTI ID:1489032

We report a method for tuning the domain spacing (Dsp) of self-assembled block copolymer thin films of poly(styrene-block-methyl methacrylate) (PS-b-PMMA) over a large range of lamellar periods. By modifying the molecular weight distribution (MWD) shape (including both the breadth and skew) of the PS block via temporal control of polymer chain initiation in anionic polymerization, we observe increases of up to 41% in Dsp for polymers with the same overall molecular weight (Mn ≈ 125 kg mol–1) without significantly changing the overall morphology or chemical composition of the final material. In conjunction with our experimental efforts, we have utilized concepts from population statistics and least-squares analysis to develop a model for predicting Dsp based on the first three moments of the MWDs. This statistical model reproduces experimental Dsp values with high fidelity (with mean absolute errors of 1.2 nm or 1.8%) and provides novel physical insight into the individual and collective roles played by the MWD moments in determining this property of interest. As a result, this work demonstrates that both MWD breadth and skew have a profound influence over Dsp, thereby providing an experimental and conceptual platform for exploiting MWD shape as a simple and modular handle for fine-tuning Dsp in block copolymer thin films.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1489032
Journal Information:
Journal of the American Chemical Society, Vol. 140, Issue 13; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 72 works
Citation information provided by
Web of Science

References (90)

Multiblock Polymers: Panacea or Pandora's Box? journal April 2012
Block Copolymer Based Nanostructures: Materials, Processes, and Applications to Electronics journal January 2010
Block Copolymer Thermodynamics: Theory and Experiment journal October 1990
Theory of Microphase Separation in Block Copolymers journal November 1980
Block copolymers as photonic bandgap materials journal November 1999
Block copolymer self-assembly for nanophotonics journal January 2015
Broad-wavelength-range chemically tunable block-copolymer photonic gels journal October 2007
Full Color Stop Bands in Hybrid Organic/Inorganic Block Copolymer Photonic Gels by Swelling−Freezing journal June 2009
Bicontinuous Cubic Block Copolymer Photonic Crystals journal December 2002
Photonic Polyethylene from Self-Assembled Mesophases of Polydisperse Olefin Block Copolymers journal June 2009
Block Copolymer Lithography: Periodic Arrays of 1011 Holes in 1 Square Centimeter journal May 1997
Block Copolymer Nanolithography: Translation of Molecular Level Control to Nanoscale Patterns journal July 2009
Density Multiplication and Improved Lithography by Directed Block Copolymer Assembly journal August 2008
Epitaxial self-assembly of block copolymers on lithographically defined nanopatterned substrates journal July 2003
Robust Nanoporous Membranes Templated by a Doubly Reactive Block Copolymer journal November 2007
Nanoporous Membranes Derived from Block Copolymers: From Drug Delivery to Water Filtration journal June 2010
Nanoporous Block Copolymer Membranes for Ultrafiltration: A Simple Approach to Size Tunability journal November 2014
Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom Pores journal January 1998
Synthesis of a Large-Scale Highly Ordered Porous Carbon Film by Self-Assembly of Block Copolymers journal November 2004
Impact of Morphological Orientation in Determining Mechanical Properties in Triblock Copolymer Systems journal January 1996
Polydispersity and block copolymer self-assembly journal September 2008
50th Anniversary Perspective : Living Polymerization—Emphasizing the Molecule in Macromolecules journal September 2017
The plastics revolution: how chemists are pushing polymers to new limits journal August 2016
Beyond Dispersity: Deterministic Control of Polymer Molecular Weight Distribution journal February 2016
“Shaping” the Future of Molecular Weight Distributions in Anionic Polymerization journal June 2016
Manipulation of Molecular Weight Distribution Shape as a New Strategy to Control Processing Parameters journal August 2017
Continuous polydispersity in a self-consistent field theory for diblock copolymers journal September 2004
Unexpected Consequences of Block Polydispersity on the Self-Assembly of ABA Triblock Copolymers journal February 2012
Polydispersity-Induced Macrophase Separation in Diblock Copolymer Melts journal October 2007
Theory of correlations in partly labelled homopolymer melts journal February 1981
Polydispersity effects on the microphase-separation transition in block copolymers journal June 1990
Polydispersity-Driven Transition from the Orthorhombic Fddd Network to Lamellae in Poly(isoprene- b -styrene- b -ethylene oxide) Triblock Terpolymers journal October 2007
Effects of Polydispersity on the Order−Disorder Transition in Block Copolymer Melts journal October 2007
Bulk and Thin Film Morphological Behavior of Broad Dispersity Poly(styrene- b- methyl methacrylate) Diblock Copolymers journal May 2013
Well-Ordered Microdomain Structures in Polydisperse Poly(styrene)−Poly(acrylic acid) Diblock Copolymers from Controlled Radical Polymerization journal August 2002
Sub-5 nm Domains in Ordered Poly(cyclohexylethylene)- block -poly(methyl methacrylate) Block Polymers for Lithography journal February 2014
Characteristics of Lamellar Mesophases in Strongly Segregated Broad Dispersity ABA Triblock Copolymers journal June 2014
Influence of Polydispersity on the Self-Assembly of Diblock Copolymers journal October 2005
“Uncontrolled” Preparation of Disperse Poly(lactide)- block -poly(styrene)- block -poly(lactide) for Nanopatterning Applications journal October 2016
Melt and Solid-State Structures of Polydisperse Polyolefin Multiblock Copolymers journal June 2012
Polydispersity-Driven Block Copolymer Amphiphile Self-Assembly into Prolate-Spheroid Micelles journal January 2012
Molecular Disorder and Mesoscopic Order in Polydisperse Acrylic Block Copolymers Prepared by Controlled Radical Polymerization journal August 2006
Effect of large degrees of polydispersity on strongly segregated block copolymers journal November 2006
Effects of Polydispersity on Phase Behavior of Diblock Copolymers journal September 2006
Effect of Polydispersity on the Phase Diagrams of Linear ABC Triblock Copolymers in Two Dimensions journal November 2005
Effect of polydispersity on the tensile modulus of diblock copolymers in a lamellar phase journal September 2005
Fluctuation effects on the order-disorder transition in polydisperse copolymer melts journal December 2013
Dispersity effects in polymer self-assemblies: a matter of hierarchical control journal January 2017
Effects of Tailored Dispersity on the Self-Assembly of Dimethylsiloxane–Methyl Methacrylate Block Co-Oligomers journal June 2017
Molecular weight dependence of lamellar domain spacing of diblock copolymers in bulk journal September 1990
Lamellar Diblock Copolymer Thin Films Investigated by Tapping Mode Atomic Force Microscopy:  Molar-Mass Dependence of Surface Ordering journal November 2003
Synthesis of High Molecular Weight Comb Block Copolymers and Their Assembly into Ordered Morphologies in the Solid State journal August 2007
Highly Oriented Thin-Film Microdomain Patterns of Ultrahigh Molecular Weight Block Copolymers via Directional Solidification of a Solvent journal October 2006
Directed Assembly of High Molecular Weight Block Copolymers: Highly Ordered Line Patterns of Perpendicularly Oriented Lamellae with Large Periods journal March 2013
Influence of molecular parameters on material processability in extrusion processes journal May 1999
Effect of molecular weight and crystallinity on poly(lactic acid) mechanical properties journal January 1996
Molecular weight and polydispersity effects at polymer-polymer interfaces journal January 1990
Interfacial tension of immiscible polymer blends: temperature and molecular weight dependence journal October 1988
Effects of block copolymer polydispersity and χN on pattern line edge roughness and line width roughness from directed self-assembly of diblock copolymers conference March 2013
Effect of Symmetry of Molecular Weight Distribution in Block Copolymers on Formation of “Metastable” Morphologies journal August 2008
Theory of Polydisperse Block Copolymer Melts: Beyond the Schulz−Zimm Distribution journal May 2008
Anionic vinyl polymerization—50 years after Michael Szwarc journal February 2007
Polymers with Complex Architecture by Living Anionic Polymerization journal December 2001
Linear and non-linear triblock terpolymers. Synthesis, self-assembly in selective solvents and in bulk journal July 2005
Sampling and Extra-Column Effects in High-Performance Liquid Chromatography; Influence of Peak Skew on Plate Count Calculations journal August 1977
Molecular weight distributions of polymers journal September 1969
Polypropylene chain scissions and molecular weight changes in multiple extrusion journal April 1998
Surface Morphology Diagram for Cylinder-Forming Block Copolymer Thin Films journal November 2008
Lamellar Diblock Copolymer Thin Films during Solvent Vapor Annealing Studied by GISAXS: Different Behavior of Parallel and Perpendicular Lamellae journal August 2014
The effect of heat treatment on the internal structure of nanostructured block copolymer films journal June 2011
A Free Energy Model for Confined Diblock Copolymers journal October 1994
Influence of film casting method on block copolymer ordering in thin films journal January 2012
Inner Structure of Thin Films of Lamellar Poly(styrene- b -butadiene) Diblock Copolymers As Revealed by Grazing-Incidence Small-Angle Scattering journal January 2007
Effect of the Molecular Weight of AB Diblock Copolymers on the Lamellar Orientation in Thin Films: Theory and Experiment journal March 2007
Unifying Weak- and Strong-Segregation Block Copolymer Theories journal January 1996
Theory of Polydisperse Inhomogeneous Polymers journal July 2003
Domain swelling in ARB-type triblock copolymers via self-adjusting effective dispersity journal January 2017
Effects of polydispersity in the end-grafted polymer brush journal March 1989
Materials informatics journal October 2005
Generalized Neural-Network Representation of High-Dimensional Potential-Energy Surfaces journal April 2007
Predicting the fracture toughness of PNCs: A stochastic approach based on ANN and ANFIS journal May 2015
Accelerating materials property predictions using machine learning journal September 2013
Characterization of polymer thin films with small‐angle X‐ray scattering under grazing incidence (GISAXS) journal September 2002
Widely Tunable Morphologies in Block Copolymer Thin Films Through Solvent Vapor Annealing Using Mixtures of Selective Solvents journal April 2015
Highly Oriented and Ordered Arrays from Block Copolymers via Solvent Evaporation journal February 2004
Structural Analysis of Block Copolymer Thin Films with Grazing Incidence Small-Angle X-ray Scattering journal May 2005
Grazing-incidence small-angle X-ray scattering from thin polymer films with lamellar structures – the scattering cross section in the distorted-wave Born approximation journal May 2006
Nika : software for two-dimensional data reduction journal March 2012
A survey of cross-validation procedures for model selection journal January 2010
Ridge Regression: Biased Estimation for Nonorthogonal Problems journal February 1970

Cited By (22)

Polymer Dispersity Control by Organocatalyzed Living Radical Polymerization journal March 2019
Comprehensive control over molecular weight distributions through automated polymerizations journal January 2019
Dispersity and architecture driven self-assembly and confined crystallization of symmetric branched block copolymers journal January 2019
Polymer Dispersity Control by Organocatalyzed Living Radical Polymerization journal March 2019
Investigation of the Locked-Unlocked Mechanism in Living Anionic Polymerization Realized with 1-(Tri-isopropoxymethylsilylphenyl)-1-phenylethylene journal November 2018
A predictive framework for mixing low dispersity polymer samples to design custom molecular weight distributions journal January 2019
Controlling polymer properties through the shape of the molecular-weight distribution journal October 2019
Effect of the molecular weight distribution of the hydrophobic block on the formation of inverse cubic mesophases of block copolymers with a discrete branched hydrophilic block journal January 2019
Tailoring polymer dispersity and shape of molecular weight distributions: methods and applications journal January 2019
Tailor-made thermoplastic elastomers: customisable materials via modulation of molecular weight distributions journal January 2020
Dispersity control in atom transfer radical polymerizations through addition of phenylhydrazine journal January 2018
Engineering self-assembly of giant molecules in the condensed state based on molecular nanoparticles journal January 2019
Tuning Dispersity by Photoinduced Atom Transfer Radical Polymerisation: Monomodal Distributions with ppm Copper Concentration journal September 2019
Predictive design of polymer molecular weight distributions in anionic polymerization journal January 2020
Recent progress on polydispersity effects on block copolymer phase behavior journal April 2019
Precise modulation of molecular weight distribution for structural engineering journal January 2019
Deconstructing Oligomer Distributions: Discrete Species and Artificial Distributions journal September 2019
Amphiphilic fluorous random copolymer self‐assembly for encapsulation of a fluorinated agrochemical journal September 2018
Tuning Dispersity by Photoinduced Atom Transfer Radical Polymerisation: Monomodal Distributions with ppm Copper Concentration journal August 2019
Deconstructing Oligomer Distributions: Discrete Species and Artificial Distributions journal July 2019
Investigation of the Locked-Unlocked Mechanism in Living Anionic Polymerization Realized with 1-(Tri-isopropoxymethylsilylphenyl)-1-phenylethylene journal November 2018
Tailoring polymer dispersity and shape of molecular weight distributions: methods and applications text January 2019