Weekly topic: 8 wealth points for those who answer correctly, 2 wealth points for participation； Question 130
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This post was last edited by Eguan Manying on 2015-8-6 08:58. Short answer: What are the main factors that affect polymer chemical reactions? Answer: ① Effects of static charge and steric hindrance ② Effect of crystallinity on polymer chemical reactions ③ Effects of solubility or swellability ④ Restrictions imposed by paired groups ⑤ Effect of chain conformation ⑥ Effect of miscibility
①Effects of static charge and steric hindrance ② Effect of crystallinity on polymer chemical reactions ③ Effect of solubility or swellability ④ Restrictions imposed by paired groups ⑤ Effect of chain conformation ⑥ Effect on miscibility
1. Physical factors； 2. Chemical factors
The main factors affecting polymer chemical reactions fall into two categories: physical factors related to the physical properties of the polymers, including crystallinity, conformational changes, solubility, and electrostatic effects； One category is structural factors related to the molecular structure of polymers, including the ortho-group effect and the functional group isolation effect.
Answer: There are mainly two categories: physical factors and structural factors. Physical factors include: crystallinity, conformational changes, solubility, and electrostatic effects. The structural factors include: the ortho-group effect, which comprises steric effects and electrostatic effects, as well as the functional group isolation effect.
Electrostatic charge and steric hindrance, crystallinity, solubility and swellability, chain conformation, compatibility
This post was last edited by Siji on 2015-8-6 10:32. Key factors affecting polymer chemical reactions: the influence of static electricity and steric hindrance, the effect of crystallinity on polymer chemical reactions, and the impact of solubility or swellability
Last edited by Siji on 2015-8-6 10:33: The effects of static electricity and steric hindrance; the influence of crystallinity on polymer chemical reactions; the effect on solubility or swellability
The main factors include physical factors related to the physical properties of the polymer, and structural factors related to the molecular structure of the polymer. Physical factors include crystallinity, conformational changes, solubility, and electrostatic effects ； Structural factors include the ortho-group effect (steric effect, electrostatic effect) and the functional group isolation effect (probability effect).
Answer: The factors affecting polymer chemical reactions include physical factors and structural factors. 1. Physical factors: such as the crystallinity, solubility, and temperature of the polymer. 2. Structural factors: The influence of the structure of the polymer itself on its chemical reactivity, also known as the polymer effect, includes the following aspects: ① Ortho-group effect: Adjacent groups on the polymer chain, including those that are involved in reactions, can alter the reactivity of the unreacted groups; this effect is referred to as the ortho-group effect. Including steric effects and electrostatic effects. ②Effect of functional group isolation: When adjacent functional groups on a polymer chain participate in reactions in pairs, due to the probability effect associated with reactions between paired groups, isolated single functional groups may occasionally form during the reaction process. Since these single functional groups find it difficult to continue reacting, they cannot be converted 100%; only a limited degree of reaction occurs.
What are the main factors that affect polymer chemical reactions? Physical effects: 1. Effects of the aggregated state 2. Effects of chain conformation Chemical effects: 1. Probability effect 2. Effect of adjacent groups