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Citation: LI Zhi-Hong, WANG Jun-Lin, ZHANG Li-Hua, CHEN Xin-Fang. Irradiation on Polyamide 1010: Effect on the Structure and Mechanism[J]. Chinese Journal of Applied Chemistry, ;2007, 24(1): 30-34. shu

Irradiation on Polyamide 1010: Effect on the Structure and Mechanism

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a Department of Materials Science and Eengineering, Jilin University, Changchun 130012;
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b Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun;
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c Changchun institute of Applied Chemistry, Chinese Academy of Sciences, Changchun

Corresponding author: LI Zhi-Hong,
Received Date: 28 January 2006
Available Online: 28 June 2006
Fund Project: 国家"八六三"计划资助(2002AA304010) (2002AA304010)

Irradiated polyamide (PA) 1010 system was investigated by using WAXD, DSC and gel fraction measurement techniques.The result indicates that the mechanism of irradiation cross linking of PA1010 is closely related to the structures of molecule aggregation and the second component.The mechanism of cross linking is multiplicity, which is a process from end-effect and strengthened cross linking to non-ruleless reactions to ruleless cross linking of main chains in the amorphous sections.For the strengthened cross linking PA1010 system, the monomers exist in the amorphous sections or between the boundary of amorphous sections and the crystalline ones, which results in the irradiated cross linking in the amorphous sections in a ruleless way during the initial stages, accelerates the cross linking and promotes the formation and accumulation of the defects on the crystalline surfaces.The crystalline surfaces were damaged when the system of PA1010 and M/P were irradiated.For the crystalline samples, when the ratio of m(BMI):m(PA1010) varied from 1:100 to 5:100, the jumping-off point of crystalline damaging decreased from 10 000 kGy to 4 500 kGy with the increasing of the content on BMI.The results indicated that the variation of△H_m of irradiated PA1010 system only had relation with the degree of cross linking, and△H_m could be regarded as the measurement and character for irradiated cross linking.For amorphous PA1010, when the cross linking exponent v>0.7, the cold-crystallizing process would be blocked during the heating process, as for crystalline PA1010, the crystal began to be damaged when v> 1.3.
- polyamide(PA) 1010,
- amorphous,
- crystallization,
- irradiation damage,
- mechanism of cross-linking
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