Which property distinguishes thermoplastics from thermosetting plastics?
They can be remelted and remoulded repeatedly
Thermoplastics consist of long polymer chains held together mainly by weak intermolecular forces, with little or no cross-linking. On heating, these weak forces are overcome, so thermoplastics soften and can be remelted and remoulded repeatedly without changing their chemical structure.
Thermosetting plastics, in contrast, form permanent, rigid cross-links between chains when first moulded and cured, so they cannot be remelted or reshaped once set; heating them further only chars or decomposes them rather than softening them.
Similar Questions
Bakelite is classified as a thermosetting plastic because it:
Organic compounds such as methanal and ethanal are classified as aldehydes because they contain which characteristic functional group?
Which functional group is responsible for the acidic nature of acetic acid ?
The first fully synthetic fibre, produced entirely from petrochemical-based substances, is :
The ability of carbon atoms to form long chains by bonding with other carbon atoms is called:
Important Questions from Organic Chemistry
Which of the hydrocarbons are arranged as per the increasing order of their boiling points?
Which one of the following statements is NOT correct?
Which among the following statements with respect to carbon is/are correct?
1. Carbon forms the basis for all living organisms and many things we use
2. Carbon shows tetra-valency and the property of catenation
3. Carbon forms covalent bonds with itself and other elements
4. Carbon forms compounds containing triple and tetra bonds between carbon atoms
Select the correct answer using the code given below:
Which one of the following statements about diamond and graphite is not correct?
Which one of the following cell organelles does NOT possess nucleic acid?
