5.高分子聚集态2 20141029 Flashcards

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1
Q

高分子非晶态是什么?

A

分子链不具备三维有序排列的聚集态

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2
Q

非晶态聚合物通常指什么?

A

完全不结晶的聚合物

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3
Q

从分子结构上,非晶态聚合物包括:

A

a 链规整性差的聚合物,如a-PP, 无规 PS,PMMA等;
b 链结构具有一定的规整性,但结晶速度极慢,如PC;
c 常温下为高弹态,如PB等
d 熔体、过冷液体
e 结晶聚合物中的非晶区

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4
Q

链规整性差的聚合物举例?

A

a-PP, 无规 PS,PMMA等;

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5
Q

a-PP (atactic polypropylene)是什么?

A

无规立构聚丙烯

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6
Q

i-PP (isotactic polyprolene)是什么?

A

等规立构的聚丙烯

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7
Q

s-PP ()syndiotactic polypropylene) 是什么?

A

间规立构聚丙烯

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8
Q

PS(Polystyrene)是什么?

A

聚苯乙烯

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9
Q

PMMA (PolymethylMethacrylate)是什么?

A

聚甲基丙烯酸甲酯

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10
Q

PC (Polycarbonate)是什么?

A

聚碳酸酯

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11
Q

PC结构很对称,那么它结晶速度慢么?

A

慢!

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12
Q

PET结构很对称,那么它结晶满么?

A

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13
Q

橡胶类材料结晶速度随着温度变化怎么变?

A

低温的时候结晶速度快

常温的时候属于高弹态,结晶速度超级慢

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14
Q

如何结晶PET?

A

在较高温度如180℃处理30天。

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15
Q

PB是什么?

A
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