Crystal transition behavior of odd–odd nylon 11,11 under annealing and stretching
Crystal transition behavior of odd–odd nylon 11,11 under annealing and stretching
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奇-奇尼龙11,11在退火和拉伸下的晶体转变行为
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Qingxiang Zhao
中科院分区：
文献类型：
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作者：
Shaobing Liu;P. Fu;Minying Liu;Zhaopeng Li;Zhenghang Lv;Qingxiang Zhao
尼龙11，11是一种新型多晶结构的奇奇聚酰胺。广角X射线散射结果表明，急冷样品的结构不是无定形的，而是结晶度较低的γ型晶体。对急冷样品分别进行高温和低温退火处理，可以得到α晶型和γ晶型的尼龙11，11。在熔化前的任何温度下退火，α型样品都没有发生晶型转变。然而，当退火温度高于145°C时，γ-形式会迅速转变为α-形式。在拉伸条件下，低温时α-晶型迅速转变为γ-晶型，高温时γ-晶型转变为α-晶型。结果表明，拉伸诱导有利于γ晶型的形成，热诱导有利于α晶型的形成。Polym.工程科学，54：2785-2790，2014.© 2013年塑料工程师协会
Nylon 11,11 is a new odd–odd polyamide with multiple crystalline structures. The wide-angle X-ray scattering indicated that the structure of quenched sample was not amorphous but a γ-form crystal with a relatively low crystallinity. The α-form and the γ-form crystal of nylon 11, 11 could be obtained by annealing the quenched samples at high and low temperature, respectively. No crystal transition happened for the α-form sample when annealed at any temperature before melting. However, the γ-form would quickly transform into the α-form when annealed above 145°C. Under the stretching conditions, the α-form rapidly transformed into the γ-form at low temperature, while the γ-form changed into the α-form only at high temperature. These results indicated that the stretching inducement was beneficial to produce the γ-form, and the thermal inducement was favorable to forming the α-form. POLYM. ENG. SCI., 54:2785–2790, 2014. © 2013 Society of Plastics Engineers