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Studying Phase Separation in Polymer Systems Through Coarse-Grained Molecular Dynamics Simulations in MATILDA.FT
Studying Phase Separation in Polymer Systems Through Coarse-Grained Molecular Dynamics Sim...
Studying Phase Separation in Polymer Systems Through Coarse-Grained Molecular Dynamics Simulations in MATILDA.FT

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자료유형  
 학위논문 서양
최종처리일시  
20260202103014
ISBN  
9798280757790
DDC  
530
저자명  
Jedlinska, Zuzanna M.
서명/저자  
Studying Phase Separation in Polymer Systems Through Coarse-Grained Molecular Dynamics Simulations in MATILDA.FT
발행사항  
[Sl] : University of Pennsylvania, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
164 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Riggleman, Robert A.
학위논문주기  
Thesis (Ph.D.)--University of Pennsylvania, 2025.
초록/해제  
요약Phase separation is a phenomenon consider to some degree in most of the research projects from the field of polymer physics. A special kind of phase separation, called liquid-liquid phase separation (LLPS) is of major importance to the functioning of biological systems. Frequently, phase separation results in a polymer lean solvent phase and the polymer rich, dense phase. However, the results of LLPS are two phases that both maintain their liquid-like properties. This liquid-like behavior of the components makes the process of LLPS fast and responsive to the changes in the environment, thus making it suitable to control the metabolism of the cells and allow them to respond to external stimuli. Intracellular condensates, created though LLPS, consist mostly of proteins, which are biomolecular polymers. Specifically, these condensates are enriched in special types of proteins, which either contain multiple intrinsically disordered regions (IDRs) or polypeptides which lack a higher order structure entirely - intrinsically disordered proteins (IDRs).We begin this thesis by providing an introduction to the topic of LLPS and IDPs. We discuss the role that the resulting condensates perform in the cells. Next, we focus on the structure and properties of their constituent IDPs. We outline how experimental, theoretical and computational methods are utilized to better understand LLPS and IDPs, listing the advantages and limitations of these methods. Lastly, we briefly introduce our groups own simulation software, MATILDA.FT, comparing it to other existing simulation packages, and showing its suitability to be used in the research concerned with LLPS. In Chapter 2 we provide an in-depth description of MATILDA.FT, its mathematical basis and algorithm implementation. In the following chapters we present various cases where MATILDA.FT has been applied to simulate coarse-grained models of bio-inspired condensates. In Chapter 3 we begin with the project concerned with the influence of monomer charge and polarizability, on the extent of phase separation and microstructure development. In addition, we in this project we also study the distribution of ions and their affinity towards polarizable and non-polarizable monomers. Subsequently, in Chapter 4, we describe a project in which we utilize dynamic bonding to induce phase separation. Dynamic bonds are relevant to both polymer materials (self-healing materials, responsive materials, sensors) and biological systems (abundance of hydrogen bonding, salt bridges, π − π, along with many other weak interactions). We show that we are able to control the extent of phase separation by changing the number and distribution of binding sites on the polymer chains. We also vary the affinity energy of bond creation, and analyze the changes in the static and dynamic properties of dynamic networks. In Chapter 5, we expand on the idea of binding-induced phase separation. We construct the systems consisting of polymer blends where chains can carry one of the two orthogonal binding sites. We show that by tuning the number of binding sites on the chains and their affinity energy, we are able to induce phase separation, resulting in two phases, each enriched in the monomers belonging to one of the binding types. We also study blends where cross-binding chains are present, which can carry binding sites of both types.
일반주제명  
Physics
일반주제명  
Polymer chemistry
일반주제명  
Physical chemistry
일반주제명  
Biochemistry
키워드  
Molecular simulation
키워드  
Polymer physics
키워드  
Phase separation
키워드  
Coarse-grained models
키워드  
Molecular dynamics
기타저자  
University of Pennsylvania Physics and Astronomy
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aJedlinska,  Zuzanna  M.
■24510▼aStudying  Phase  Separation  in  Polymer  Systems  Through  Coarse-Grained  Molecular  Dynamics  Simulations  in  MATILDA.FT
■260    ▼a[Sl]▼bUniversity  of  Pennsylvania▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a164  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Riggleman,  Robert  A.
■5021  ▼aThesis  (Ph.D.)--University  of  Pennsylvania,  2025.
■520    ▼aPhase  separation  is  a  phenomenon  consider  to  some  degree  in  most  of  the  research  projects  from  the  field  of  polymer  physics.  A  special  kind  of  phase  separation,  called  liquid-liquid  phase  separation  (LLPS)  is  of  major  importance  to  the  functioning  of  biological  systems.  Frequently,  phase  separation  results  in  a  polymer  lean  solvent  phase  and  the  polymer  rich,  dense  phase.  However,  the  results  of  LLPS  are  two  phases  that  both  maintain  their  liquid-like  properties.  This  liquid-like  behavior  of  the  components  makes  the  process  of  LLPS  fast  and  responsive  to  the  changes  in  the  environment,  thus  making  it  suitable  to  control  the  metabolism  of  the  cells  and  allow  them  to  respond  to  external  stimuli.  Intracellular  condensates,  created  though  LLPS,  consist  mostly  of  proteins,  which  are  biomolecular  polymers.  Specifically,  these  condensates  are  enriched  in  special  types  of  proteins,  which  either  contain  multiple  intrinsically  disordered  regions  (IDRs)  or  polypeptides  which  lack  a  higher  order  structure  entirely  -  intrinsically  disordered  proteins  (IDRs).We  begin  this  thesis  by  providing  an  introduction  to  the  topic  of  LLPS  and  IDPs.  We  discuss  the  role  that  the  resulting  condensates  perform  in  the  cells.  Next,  we  focus  on  the  structure  and  properties  of  their  constituent  IDPs.  We  outline  how  experimental,  theoretical  and  computational  methods  are  utilized  to  better  understand  LLPS  and  IDPs,  listing  the  advantages  and  limitations  of  these  methods.  Lastly,  we  briefly  introduce  our  groups  own  simulation  software,  MATILDA.FT,  comparing  it  to  other  existing  simulation  packages,  and  showing  its  suitability  to  be  used  in  the  research  concerned  with  LLPS.  In  Chapter  2  we  provide  an  in-depth  description  of  MATILDA.FT,  its  mathematical  basis  and  algorithm  implementation.  In  the  following  chapters  we  present  various  cases  where  MATILDA.FT  has  been  applied  to  simulate  coarse-grained  models  of  bio-inspired  condensates.  In  Chapter  3  we  begin  with  the  project  concerned  with  the  influence  of  monomer  charge and  polarizability,  on  the  extent  of  phase  separation  and  microstructure  development.  In  addition,  we  in  this  project  we  also  study  the  distribution  of  ions  and  their  affinity  towards  polarizable  and  non-polarizable  monomers.  Subsequently,  in  Chapter  4,  we  describe  a  project  in  which  we  utilize  dynamic  bonding  to  induce  phase  separation.  Dynamic  bonds  are  relevant  to  both  polymer  materials  (self-healing  materials,  responsive  materials,  sensors)  and  biological  systems  (abundance  of  hydrogen  bonding,  salt  bridges,  π  −  π,  along  with  many  other  weak  interactions).  We  show  that  we  are  able  to  control  the  extent  of  phase  separation  by  changing  the  number  and  distribution  of  binding  sites  on  the  polymer  chains.  We  also  vary  the  affinity  energy  of  bond  creation,  and  analyze  the  changes  in  the  static  and  dynamic  properties  of  dynamic  networks.  In  Chapter  5,  we  expand  on  the  idea  of  binding-induced  phase  separation.  We  construct  the  systems  consisting  of  polymer  blends  where  chains  can  carry  one  of  the  two  orthogonal  binding  sites.  We  show  that  by  tuning  the  number  of  binding  sites  on  the  chains  and  their  affinity  energy,  we  are  able  to  induce  phase  separation,  resulting  in  two  phases,  each  enriched  in  the  monomers  belonging  to  one  of  the  binding  types.  We  also  study  blends  where  cross-binding  chains  are  present,  which  can  carry  binding  sites  of  both  types.
■590    ▼aSchool  code:  0175.
■650  4▼aPhysics
■650  4▼aPolymer  chemistry
■650  4▼aPhysical  chemistry
■650  4▼aBiochemistry
■653    ▼aMolecular  simulation
■653    ▼aPolymer  physics
■653    ▼aPhase  separation
■653    ▼aCoarse-grained  models
■653    ▼aMolecular  dynamics
■690    ▼a0605
■690    ▼a0495
■690    ▼a0487
■690    ▼a0494
■71020▼aUniversity  of  Pennsylvania▼bPhysics  and  Astronomy.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0175
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356669▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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