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热熔型胶粘剂的黏结原理是( )

单选题
2021-09-02 13:45
A、通过加热熔融粘合,随后冷却、固化,发挥粘合力
B、由不可逆的化学变化而引起的
C、溶剂从粘合端面挥发或者被吸收,形成粘合膜而发挥粘合力
D、由冰冻凝固而形成的反作用力引起的
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正确答案
A

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