本研究主要針對天然橡膠系（natural rubber；NR）掺合體（NR/BR、ENR/CR）之木尼粘度（Mooney viscosity）、硫化速率（curing rate）、型態學（morphology）、力學性質、熱老化特性及動態機械性質（dynamic mechanical properties）等做一系列探討。並進一步使用氯平（Neoprene；polychloroprene；CR）乳膠（latex）結合傳統的RFL浸漬技術中的間苯二酚（resorcinol）與福馬林（formaldehyde）之縮合體（RF樹脂），做為織物（fabric）與NR/BR 摻合膠之接著處理液。經由不同的CR latex含量與處理條件，來探討CR latex 應用於織物與NR/BR 摻合膠接著（adhesion）之影響效應，從這些研究結果，我們獲得下面結論。
1.NR/BR摻合膠之研究方面：
實驗結果顯示NR具有較低的木尼粘度值，且初期流動性優於BR的初期流動性。另外，NR/BR摻合膠之木尼粘度值隨著NR摻合量增加而傾向具有較低的木尼粘度值，因而藉由NR的摻合而使BR加工性獲得較佳的改進。此外，NR/BR摻合膠的硫化速率因較高的硫化溫度而變得較快，且NR的硫化速率比BR快速。NR/BR摻合膠的焦燒時間（scorch time）與最適加硫時間（optimum cure time）會隨著NR含量增加而減少。另外，在NR/BR摻合膠中，NR的Tαn與BR的Tαb兩特性峰完全分離出現，這意味著NR/BR摻合膠中兩種橡膠是不具有相容性，而且Tαb特性峰隨著NR含量的增加而移動至較低溫範圍出現；同時Tαn特性峰隨著NR含量的減少而移動至較低溫範圍出現。另外，NR的表面顯示出團塊狀（domain status）的分佈，BR表面則顯示出均勻狀（uniform status）的分佈。而NR的斷面（fracture surfaces）形態比BR更平整且均勻。NR/BR摻合膠之抗張強度（tensile strength）與撕裂強度（tear strength）會隨著NR含量的增加而增加。由於BR之壓縮剛性（compression stiffness）較NR之壓縮剛性高，使得BR在相同荷重下之變形較NR小。此外，NR比BR具有較低的透氣性值，亦即是NR氣密性優於BR。而NR/BR摻合膠隨著NR含量之增加而使氣體透過率變為更少，而達到較佳的氣密性。而在老化性質方面， NR/BR摻合膠在延長熱老化時間之後，抗張應力（tensile stress）與抗張應變（tensile strain）均減少。此外，BR應力損失較NR為低，這意味著BR耐熱老化抵抗性質是比NR優異。更進一步地，由於熱歷史的累積，使得NR/BR摻合膠之玻璃轉移溫度（Tg）出現的位置往低溫方向移動，且阻尼（tanδ）也隨熱老化延長而增加。
2.ENR/CR摻合膠之研究方面：
實驗結果顯示ENR/CR摻合膠之木尼粘度隨著ENR含量增加而降低。ENR/CR摻合膠之塑化效應以摻合比為75/25時最為顯著，因而獲得較佳之加工性。在高溫時，由於ENR環氧基團（epoxy group）的開環（ring-opening）反應，使得交聯形成速率比CR快速，導致ENR/CR摻合膠硫化速率隨著ENR含量的增加而增加。經由實驗結果得知，ENR/CR摻合膠最佳的加工條件為溫度175 0C，硫化時間為5分鐘為最佳之加工條件。ENR/CR摻合膠之動態機械分析（DMA）圖顯示出現單一的阻尼特性峰，這意味著ENR摻合CR所形成之摻合膠是具有相容性（miscible）。觀察ENR/CR摻合膠之頻率對Tg所做之阿瑞尼士圖（Arrhenius plot），顯示出ENR/CR摻合膠之活化能隨ENR含量之增加而增加，這意味著兩種橡膠之分子鏈網目間存在著相互作用之結構。
3. NR/BR摻合膠與織物接著之研究方面：
實驗結果顯示織物經CR latex 100 phr配方處理且於不同的乾燥溫度下乾燥後，NR/BR摻合膠以NR100與織物間之剝離強度（peel strength）最高，而NR0（純BR）則最低。織物經CR latex 100 phr配方處理後之乾燥溫度以150℃處理時為最佳。傳統的RFL浸漬液中使用乙烯基砒啶（vinyl pyridine；VP）latex處理織物時，織物對於NR/BR摻合膠之剝離強度最高，並且對於三種不同NR/BR 摻合膠之剝離強度值並無明顯變化。當傳統的RFL浸漬液中使用CR latex系統處理織物時，NR/BR 摻合膠對於織物之剝離強度隨NR含量減少（ BR含量增加）與CR latex 含量減少而降低。當使用CR latex系統於RFL接著處理液中，於CR latex中加入架橋劑、促進劑等添加劑可提昇織物與NR/BR摻合膠之剝離強度。

In the study, we research the Mooney viscosity, curing rate, morphologies, mechanical properties, post-thermal aging properties and dynamic mechanical properties of a series of nature rubber blends (NR/BR, ENR/CR). Furthermore, we used Neoprene (polychloroprene; CR) latex with the condensation polymers(RF resin) of resorcinol and formaldehyde in traditional RFL dip technology as the adhesion for fabric and NR/BR blends. Under different CR latex contents and treatment conditions, investigated the influence and effect of using CR latex in the adhesion of fabric and NR/BR blends. From these results, we obtained the following results.
1. The study on NR/BR blends
The experimental results show that NR has a lower Mooney viscosity, and its initial fluidity is superior to that of BR. Moreover, NR/BR blends tend to have lower Mooney viscosity with increasing NR content. Thus, blending of NR leads to good improvement in BR processibility. Curing rate for NR/BR blends becomes faster with higher curing temperature. Furthermore, curing rate of NR is faster than that of BR. Both scorch time (ts2) and optimum curing time (tc90) of NR/BR blends decrease with increasing NR content. In NR/BR blends, the two peaks corresponding to NR’ Tαn and BR’ Tαb are well separated, meaning that NR/BR blends are immiscible. Moreover, Tαb moves to a low temperature range with increasing NR content, while Tαn moves to a low temperature range with decreasing NR content. In addition, NR surface reveals a domain status of distribution, whereas BR surface shows a uniformly dispersed distribution. Moreover, the fracture surfaces of NR are neater and more even than those of BR. Both tensile and tear strengths of NR/BR blends increase with increasing NR content. BR has higher compression stiffness than NR. The deformation of BR is smaller than that of NR under the same load conditions. In addition, NR has lower air permeability than BR; meaning that the air impermeability of NR is superior to that of BR. NR/BR blends become less gas permeable and achieve better air impermeability with increasing NR content. With regard to aging properties, both tensile stress and strain of NR/BR blends decrease after prolonged aging. In addition, the stress loss of BR is lower than that of NR, meaning that the aging resistance property of BR is superior to that of NR. Furthermore, accumulated thermal history has shifted the glass transition temperature (Tg) of NR/BR blends towards lower temperatures while the loss tangent (tanδ) value increases with prolonged thermal aging.
2. The study on ENR/CR blends
The experimental results of ENR/CR blends show that the Mooney viscosity decreased gradually. Plasticization was most pronounced at an ENR/CR ratio of 75/25, and is thus the easiest to process. Owing to the ring-opening of the epoxy group of ENR, the rate of crosslink formation is much faster than that of CR at higher temperature. The vulcanized rate increased with increasing ENR content. The results indicated that 175°C and 5 minutes were the optimum processing conditions for ENR/CR blends. The DMA spectra showed a single damping peak for the ENR/CR blends, which suggests that ENR and CR are miscible. As seen in the Arrhenius plot of frequency against Tg , the activation energy increased with increasing ENR contents. This suggests the existence of interpenetration of these two rubber molecular networks.
3. The study on adhesion of NR/BR blends and textile fabric
The experiment result showed that after the fabric is treated with CR latex 100 phr and dried under different drying temperatures, the peel strength of NR100 was the highest and NR0 (pure BR) was the lowest. The best drying temperature for fabric treated with CR latex 100 phr is at 150℃. For vinyl pyridine (VP) latex used to treat fabric in traditional RFL dipping solution, the peel strength of fabric on NR/BR blends is the highest and showed no significant change on the peel strength values of three different kinds of NR/BR blends. When traditional RFL dipping solution is used with CR latex system to treat fabric, the peel strength of NR/BR blends on fabric decreased as the NR content decreased (BR content increased) and CR latex content decreased. When CR latex system was used in the RFL adhesive treatment solution and additives such as cross-linking agent and catalyst were added into CR latex, the peel strength between the fabric and NR/BR blends was increased.

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