שאלה | Which of the following differences between polymers with chemical covalent crosslinks as compared to ionic and non-covalent crosslinks, is not correct? (Choose from the following four possibilities)

Which of the following differences between polymers with chemical covalent crosslinks as compared to ionic and non-covalent crosslinks, is not correct? (Choose from the following four possibilities)

		Improvement in mechanical properties of polymers can be by both covalent crosslinks and physical non covalent or ionic crosslinks.
		Covalent chemical crosslinks prevent or reduce swelling or solubility in solvents but ionic and non-covalent crosslinks do not influence these characteristics
		Chemical crosslinks are stable at elevated temperatures but ionic and physical crosslinks are not.
		None of the above