A-Level Chemistry Revision — Polymers (A-Level)
Revise Polymers (A-Level) for A-Level Chemistry with a topic explanation, worked example and common mistakes. Check the board notes for specification differences.
At a glance
- What StudyVector is
- An exam-practice platform with board-aligned questions, explanations, and adaptive next steps.
- This topic
- Polymers (A-Level) in A-Level Chemistry: explanation, examples, and practice links on this page.
- Who it’s for
- Students revising A-Level Chemistry for UK exams.
- Exam boards
- Check your course page and the topic board notes for supported specifications.
- Free plan
- Sign up free to use tutor paths and feedback on your answers. Free access is Free daily revision · No card required. Pricing
- What makes it different
- Syllabus-shaped practice and progress tracking—not generic AI answers.
This page includes a topic explanation and a worked example. Check your course for current practice coverage.
Recommended next topic
Next step: Alkanes (A-Level)
Continue in the same course — structured practice and explanations on StudyVector.
Go to Alkanes (A-Level)Topic explanation
What is Polymers (A-Level)?
A-Level polymer chemistry builds on GCSE by distinguishing between two main types of polymerisation: addition and condensation. Addition polymerisation involves the joining of monomers (usually alkenes) without the loss of any atoms. Condensation polymerisation involves the reaction between two different functional groups on monomers, with the elimination of a small molecule, usually water. The properties of polymers, such as biodegradability and the effect of plasticisers, are also explored.
Board notes: All boards require students to be able to draw the repeating units for both addition and condensation polymers. AQA often asks about the environmental issues associated with polymer disposal and the advantages of recycling and biodegradable polymers. Edexcel places emphasis on the different types of condensation polymers, including polyesters and polyamides. OCR frequently tests the hydrolysis of polymers and the identification of the constituent monomers.
Step-by-step explanationWorked examples
Worked example
Draw the repeating unit of the polyester formed from the reaction of ethane-1,2-diol and benzene-1,4-dicarboxylic acid. Step 1: Identify the functional groups: an alcohol (-OH) on the diol and a carboxylic acid (-COOH) on the dicarboxylic acid. Step 2: These will react in a condensation reaction to form an ester link (-COO-) and eliminate a water molecule. Step 3: The repeating unit will show the two monomer residues joined by the ester link: -[O-CH2-CH2-O-CO-C6H4-CO]-.
Practise this topic
Start with low-focus cards for Polymers (A-Level), then move into full exam-style practice when you want the heavier session.
Common mistakes
- 1Confusing addition and condensation polymerisation. Addition polymers are formed from one type of monomer with a C=C bond, while condensation polymers are typically formed from two different monomers, each with two functional groups.
- 2Incorrectly drawing the repeating unit of a polymer. For an addition polymer, the double bond breaks and the repeating unit is the monomer unit with single bonds extending out. For a condensation polymer, the repeating unit consists of the monomer units joined by a new link (e.g., an ester or amide link) with the small molecule removed.
- 3Assuming all polymers are non-biodegradable. While many synthetic polymers like poly(ethene) are non-biodegradable, polyesters and polyamides can be broken down by hydrolysis, making them susceptible to degradation, especially by acids or alkalis.
Polymers (A-Level) exam questions
Check the available question sets for Polymers (A-Level). Use your course and exam board to confirm which practice is relevant.
Polymers (A-Level) exam questionsGet help with Polymers (A-Level)
Get a personalised explanation for Polymers (A-Level) from the StudyVector tutor. Ask follow-up questions and work through problems with step-by-step support.
Open tutorSave your progress in Polymers (A-Level)
Start a free account for low-focus question cards, feedback and Play routes across available topics. Free daily limits apply; no card required.
Continue your revision
A public question for Polymers (A-Level) is still being reviewed. Your course page shows the topics currently available for practice.
Continue with Polymers (A-Level)
Create a free account to keep your course choice and save your practice progress.
Start free low-focus cardsAlready have an account? Log in
Frequently asked questions
What is the difference between a thermoplastic and a thermosetting polymer?
Thermoplastics consist of long polymer chains with weak intermolecular forces between them, which can be easily overcome by heating, allowing the polymer to be melted and reshaped. Thermosetting polymers have strong covalent cross-links between the chains, creating a rigid 3D structure that does not melt on heating but will char at high temperatures.
How do plasticisers work?
Plasticisers are small molecules that are added to a polymer. They get between the polymer chains and push them further apart, which weakens the intermolecular forces. This makes the polymer more flexible and easier to bend.