2017 Polymer Chemistry IV (Crosslinking Reactions)

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Academic unit or major
Undergraduate major in Chemical Science and Engineering
Saito Reiko 
Class Format
Media-enhanced courses
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Course description and aims

Gels are important soft-materials.
This course focuses on the crosslinking of polymers, which is an important method to synthesize gel, and on the properties of gels. Topics include crosslinking between polymer and low molecular compounds, polymer and polymer, direct synthetic reactions of gel from monomers, Flory's gelation theory Carothers equation, the properties of gels and thermodynamics of swelling of gels. The course enables students to understand and design of crosslinking for gels.

Student learning outcomes

By the end of this course, students will be able to:
1) Explain the principles of crosslinking of polymer.
2) Understand the properties of gels synthesized via crosslinking.
3) Acquire the relationship between crosslinking and properties of gel.
4) Obtain gel point and design the crosslinking system for certain gel.


Crosslinking, gel, gel point, polymer complex, swelling.

Competencies that will be developed

Specialist skills Intercultural skills Communication skills Critical thinking skills Practical and/or problem-solving skills

Class flow

Towards the end of class, students are given exercise problems related to what is taught on that day to solve.
Before coming to class, students should read the course schedule and check what topics will be covered.

Course schedule/Required learning

  Course schedule Required learning
Class 1 Introduction, What is gel? Understand gel and the classification of gel
Class 2 Crosslinking of polymers with low molecular compounds -Synthesis of gel with polymer and low molecular compounds- Understand the basic reaction concept and the design of reaction system.
Class 3 Crosslinking of polymers with polymers -Polymer complex- Understand the reaction concept between polymers and explain polymer complex.
Class 4 Crosslinking during polymerization -Synthesis of gel from monomers- Explain the architectures of gels from r1 and r2
Class 5 Gel pint I -Flory's gelation theory- Calculate the gel point based on Flory's gelation theory
Class 6 Gel pint II -Carothers equation- Calculate the gel point based on Carothers equation
Class 7 Swelling of Gel Explain the swelling behavior of gel thermodynamically.
Class 8 Summery and examination Summarize the crosslinking and gel, Examination


(Japanese) 高分子学会編「基礎高分子科学」東京化学同人 ISBN-13: 978-4807906352

Reference books, course materials, etc.

Odian "Principales of polymerization" Wiley ISBN-13: 978-8126513918,
(Japanese) 中濱精一ほか 「エッセンシャル高分子科学」 講談社サイエンティフィク ISBN-10: 406153310X,
(Japanese) 高分子学会編「高分子科学の基礎」東京化学同人 ISBN-10: 4807904051

Assessment criteria and methods

Students' knowledge of design of crosslinking, the properties of gel ad the relationship between synthesis method and the properties of gels, the calculation of gel points and their ability to apply them to design of gel.
Final exam (80%), exercise problems (20%).

Related courses

  • CAP.P211 : Polymer Chemistry I (Step-Growth Polymerization)
  • CAP.P212 : Polymer Chemistry II (Chain Polymerization)
  • CAP.P311 : Polymer Chemistry III (Polymer Reactions)

Prerequisites (i.e., required knowledge, skills, courses, etc.)

Students must have enough knowledge of Polymer chemistry I-III, Organic chemistry, polymer physics and basic thermodynamics.

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